Especialización Segmento Anterior y Lentes de Contacto

URI permanente para esta colecciónhttp://hdl.handle.net/11634/3243

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Reporte de caso: Adaptación de lentes de contacto híbridos en paciente con Crosslinking y anillos intraestromales en consultorio particular en Medellín en el año 2025 y 2026
(Universidad Santo Tomás, 2026-03-18) Agudelo Barbosa; Vargas Velasco, Jorge Giovanni; Narvaez Rumie, Olivia Margarita; Universidad Santo Tomás
Keratoconus is a degenerative disorder characterized by corneal thinning, which causes irregular astigmatism and impaired vision. It is usually bilateral, but often asymmetric (1). Objective: To fit hybrid contact lenses to a patient with crosslinking and intrastromal ring implants in a private practice in Medellín in 2025 and 2026. Methodology: This was a descriptive, observational case report study in which hybrid contact lenses were fitted to a patient diagnosed with keratoconus and with a history of crosslinking and intrastromal ring implants. Case report: An 18-year-old female patient with a history of keratoconus and crosslinking and intrastromal ring implant surgery in both eyes was successfully fitted with good visual acuity and comfort. Results: A Duette brand hybrid contact lens was fitted, achieving comfort and improvement in distance and near vision to 20/30 in the right eye and 20/25 in the left eye. Conclusions: Hybrid contact lenses are an effective alternative for visual rehabilitation, even in those with a history of corneal crosslinking and intracorneal ring implantation.
Manejo contactológico unilateral con lente rígido gas permeable en paciente con queratoplastia y endotelio comprometido en Apartadó Antioquía, 2025. Reporte de caso
(Universidad Santo Tomás, 2026-03-11) León Borrero, Cristal Vanessa; Narváez Rumie, Olivia Margarita; Universidad Santo Tomas
Keratoplasty, also known as corneal transplantation, is a surgical procedure in which damaged corneal tissue is replaced with healthy tissue to restore visual function. After surgery, corneal irregularities and high astigmatism may persist, limiting visual quality with conventional optical correction. In these cases, rigid gas-permeable contact lenses (RGPCL) represent an effective alternative to improve visual acuity and optical quality.Objective: To determine the contact lens management using a rigid gas-permeable lens in a patient with keratoplasty and unilateral endothelial compromise.Methodology: An observational descriptive study in the form of a case report was conducted. A complete clinical history, comprehensive optometric examination, and ocular surface evaluation with slit-lamp biomicroscopy were performed. Complementary examinations, including corneal topography and endothelial cell count, were analyzed. Subsequently, a Rose K2 Post Graft rigid corneal lens was fitted.Results: The patient achieved a distance visual acuity of 20/25 and functional near vision, with good comfort and corneal stability after six hours of continuous lens wear. Slit-lamp evaluation showed an intact corneal epithelium and a uniform fluorescein pattern. Conclusion: Specialized rigid gas-permeable contact lenses are an effective alternative for visual rehabilitation in post-keratoplasty patients with corneal irregularity and endothelial compromise. Keywords: keratoplasty, rigid gas-permeable contact lens, contact lens fitting, endothelial cells, case report.
Reporte de caso: adaptación de lentes de contacto rígidos de apoyo escleral en paciente con queratocono en Quito, Ecuador
(Universidad Santo Tomás, 2026-02-25) Jara Maza, Alba Marilú; Martinez, Ingrid Maritza; Narvaez Rumie, Olivia Margarita; Universidad Santo Tomas
Introduction: Keratoconus is a progressive eye disease characterized by thinning and protrusion of the cornea, causing deformation of its normal shape and deterioration of visual quality. Objective: To fit a rigid scleral contact lens in a 20-year-old female patient diagnosed with keratoconus in the city of Quito. Methodology: Descriptive observational study in the form of a case report. A complete medical history was compiled, including an assessment of uncorrected visual acuity, subjective refraction, biomicroscopy of the anterior segment, and bilateral corneal tomography analysis, with determination of keratometric and pachymetric parameters and corneal elevation for the selection of One Fit Med scleral lenses. Case description: A 20-year-old female patient, a shopkeeper, with decreased visual acuity and unsatisfactory results with air lenses. The specialized evaluation confirmed bilateral asymmetric keratoconus, with inadequate visual correction using glasses. It was decided to fit rigid scleral support contact lenses to improve visual quality and ocular surface symptoms. Results: The scleral lens fit was stable, comfortable, and secure, achieving complete improvement in distance and near visual acuity (20/20 in both eyes) with sustained visual rehabilitation and protection of the corneal surface. Conclusions: Scleral: support contact lenses are an effective therapeutic strategy for visual rehabilitation in patients with keratoconus, improving visual function and quality of life,provided that a thorough evaluation, personalized fitting, and regular follow-up are performed.
Reporte De Caso: Adaptación De Lentes Blandos Especializados ARC en Paciente con Queratocono (Post Implante de Anillos Intraestromales)
(Universidad Santo Tomás, 2026-02-23) Pinzon Parra, Andres Camilo; Marquez Garcia, Martha Lucila; Universidad Santo Tomas
Keratoconus is a progressive corneal disorder characterized by corneal thinning and protrusion, associated with collagen dysfunction, which leads to significant alterations in both the quantity and quality of the patient’s visual performance. Various therapeutic alternatives are available for its management, including corneal cross-linking, intracorneal ring segment implantation, and corneal transplantation in advanced stages, as well as multiple options for visual correction using spectacle lenses and contact lenses. The aim of this study is to describe the fitting of Flex Lens ARC contact lenses in a patient with a history of bilateral intracorneal ring segment implantation and poor tolerance to rigid contact lenses and spectacles. This case report presents a clinical and topographic evaluation followed by the fitting of special-design soft contact lenses (Flex Lens ARC). Current topographic parameters and their influence on the lens fitting were analyzed. As a result, a visual acuity of 20/25 was achieved in both eyes, with good comfort and tolerance. The fitting demonstrated stability, good centration, and satisfactory repeatability in subsequent lens orders. In conclusion, this case highlights the importance of an individualized and dynamic evaluation in keratoconus patients treated with intracorneal ring segments, as well as the clinician’s knowledge of available technologies to achieve a functional and satisfactory visual outcome.
reporte de caso: adaptación de lente rígido de apoyo escleral en un páciente con cornea irregular post queratotomia radial y lasik complementario en un centro de referencia en Bogota (2014)
(Universidad Santo Tomás, 2026-01-26) Rodriguez Viviescas, Carlos Julián; Mateus González, Guiomar Stefanie; Martinez Rodríguez, Ingrid Maritza; Universidad Santo Tomás
Radial keratotomy (RK) was a widely used procedure for myopia correction during the 1980s and 1990s; however, long-term complications such as corneal irregularity, irregular astigmatism, and decreased visual quality were later reported. Some patients subsequently underwent additional procedures such as LASIK (Laser-Assisted In Situ Keratomileusis), with variable outcomes. Objective: To describe the fitting process of a scleral support lens in a patient with irregular cornea secondary to radial keratotomy and complementary LASIK. Methodology: A descriptive observational case report in which an Airkone Scleral Toric lens was fitted in both eyes, assessing fit parameters, comfort, and visual performance. Case presentation: A 60-year-old male patient with a history of RK, LASIK, and cataract surgery with toric intraocular lens implantation consulted due to persistent decreased vision and functional limitation. Results: The initial adaptation with rigid gas permeable lenses provided partial improvement in visual acuity, achieving 20/25 distance vision in both eyes and near vision with +3.00 Diopters addition at 0.50 m, although with poor tolerance and mild epithelial signs. In contrast, the Airkone Scleral Toric lenses proved stable, comfortable, and safe, providing 20/25 distance visual acuity in both eyes and adequate near vision with reading glasses (+3.00 Diopters addition), while also improving ocular surface protection and refractive stability. Conclusions: Scleral support lenses represent an effective and safe alternative for visual rehabilitation in post-surgical irregular corneas, offering enhanced optical quality, comfort, and corneal structural preservation during prolonged wear.
Adaptación de Lentes de Contacto Híbridos posterior a cirugía de anillos intraestromales en Bogotá durante el 2025
(Universidad Santo Tomás, 2026-01-26) Caicedo Guzman, Karol Lizette; Alvarado Alvarado, Maria Helena; Márquez García, Martha Lucia; Narvaez Rumie, Olivia Margarita; Universidad Santo Tomás
Keratoconus is a progressive inflammatory corneal ectasia characterized by central or paracentral corneal thinning, generally with irregular and asymmetric astigmatism. Objective To fit a hybrid contact lens in a patient diagnosed with grade II keratoconus in both eyes, post-surgical intrastromal rings and intolerance to limbal gas permeable lenses (FIBA) in the city of Bogota in 2025. Methodology: Prospective observational descriptive study, case report type, where a DUETTE hybrid contact lens is adapted, adapted to grade II keratoconus in both eyes satisfactorily. Description of the Case, 26-year-old female patient who during the optometry examination was shown to have type II keratoconus in both eyes, without successful experience in her gas permeable lenses after intrastromal rings surgery, also with a pathological diagnosis of the ocular surface that led to the rejection of this adaptation, due to this it is decided to adapt a hybrid contact lens seeking to improve visual quality and comfort, Results a hybrid contact lens was adapted DUETTE in both eyes obtaining quality and visual comfort with a visual acuity in both eyes of distance and near 20/20 Conclusions hybrid contact lenses with corneal and scleral support are a good alternative for patients who have intolerance to corneal or limbal contact lenses allowing the patient to have good visual quality and comfort despite their alteration in the ocular surface
Comparación clínica entre lentes RGP esféricas y asféricas versus lentes de apoyo escleral en paciente con anillos intraestomales: reporte de caso
(Universidad Santo Tomás, 2026-01-26) Guevara Nieto, Jordán Andrés; Daza Martínez, Camilo Luís; Universidad Santo Tomás
This research paper presents the clinical case of a patient with moderate keratoconus and a history of intracorneal ring segment (ICRS) implantation, who presented with decreased visual acuity and ocular discomfort. Through a comprehensive evaluation, including slit-lamp biomicroscopy, corneal topography, and contact lens fitting trials, three types of rigid gas permeable (RGP) lenses were assessed: spherical, aspheric, and scleral designs. Spherical and aspheric lenses demonstrated limitations in both stability and comfort. In contrast, scleral lenses provided superior interaction with the ocular surface, enhanced comfort, and improved visual acuity. Clinical findings revealed that scleral lenses, due to their vaulting design and ability to create a new, regular optical surface via a tear reservoir, significantly outperformed conventional corneal lens designs. This fitting approach helped reduce optical aberrations caused by corneal irregularity, promoted epithelial hydration, and evenly distributed pressure across the ocular surface, resulting in a more stable and comfortable visual experience for the patient. Although the inclusion of scleral lenses was not the initial objective of the study, it ultimately proved to be the most effective alternative. The study concludes that, in patients with a history of corneal surgery and keratoconus, contact lens fitting must be individualized and guided by specific topographic parameters. While aspheric lenses offered better alignment than spherical designs, scleral lenses yielded the most favorable clinical outcomes. This case underscores the importance of conducting multiple fitting trials and considering alternative lens designs to ensure successful visual rehabilitation and enhance patients’ quality of life.
Huella de carbono corporativa en la práctica optométrica en grupo de ópticas de diferentes municipios de Colombia en el año 2024
(Universidad Santo Tomás, 2026-01-23) Herrera Herrera, Julieth Alexandra; D'Antone, Valeria Andrea; Universidad Santo Tomás
Climate change represents one of the greatest environmental and public health challenges worldwide. The health sector, including visual care services, generates greenhouse gas (GHG) emissions that must be quantified in order to design effective mitigation strategies. In Colombia, there are no previous studies assessing the carbon footprint of optical practices, revealing a gap in knowledge and sustainability actions within this sector.Objective: To determine the corporate carbon footprint of optical practices located in different Colombian cities, identifying the main emission sources according to the established scopes.Methodology: An observational, descriptive, cross-sectional study was conducted using the Carbon Neutral Plus digital calculator, based on the Greenhouse Gas Protocol (GHG Protocol), to estimate the corporate carbon footprint from data on energy consumption, refrigerant use, transportation, and operational characteristics. A convenience sample of 15 commercial optical practices located in different municipalities of Colombia was included. Data were collected through structured, self-administered questionnaires adapted to the categories of energy consumption, transportation, and waste management.Results: In 2024, the total corporate carbon footprint of the evaluated optical practices was 57.04 tCO₂e. Scope 1 was the main source of emissions, accounting for 42.62 tCO₂e (74.8%), mainly associated with fugitive emissions from refrigerants and fire extinguishers, with R-410A being the most frequently used. Scope 2 contributed 6.27 tCO₂e (11.0%) from electricity consumption, while Scope 3 generated 8.15 tCO₂e (14.3%), primarily related to staff and patient transportation and work-related travel. Significant variability was observed among optical practices, associated with operational and contextual differences across municipalities.Discussion: The findings show that optometric practice, despite its ambulatory and small-scale nature, generates a relevant environmental impact. Scope 1 emissions predominate due to refrigerant use, while energy consumption (Scope 2) is moderate and transportation (Scope 3) represents a significant indirect source of emissions. These results highlight the need to measure the carbon footprint to guide sustainable practices in the Colombian optometric sector.Conclusion: Optometric practice in Colombia generates a relevant corporate carbon footprint, even as a small-scale ambulatory service, with a predominance of direct emissions associated with refrigerant use. These findings underscore the importance of incorporating carbon footprint assessment as a strategic tool to promote more sustainable environmental management in the optometric sector.
Reporte de caso: Adaptación de lente rígido de apoyo escleral en ectasia corneal Post-LASIK con diagnóstico de ojo seco severo y glaucoma primario de ángulo abierto en Ciudad de México, 2025
(Universidad Santo Tomás, 2026-01-21) Herrera Rivera, Jessica Viviana; Silva Romano, Sandra Karina; Morón, Catalina; Narvaez, Olivia; Universidad Santo Tomás
Surgical corrections of refractive errors can lead to complications such as corneal ectasia and severe dry eye, which complicate visual management. Scleral lenses act simultaneously as therapeutic devices, offering effective alternatives to improve visual acuity. However, the situation becomes more complex when patients have conditions such as glaucoma treated with an-Express valve, where the lens's presence alters the anatomical architecture and its stability must be protected. Objective: To fit a scleral contact lens in a patient with corneal ectasia, severe dry eye, and glaucoma with a history of post-LASIK surgery in an ophthalmology clinic in Mexico City, 2025, through a case report. Methodology: A descriptive clinical case report was prepared based on information obtained from the medical history, complementary examinations provided by the ophthalmology department, and the patient's follow-up during scleral contact lens fitting and subsequent check-ups. Conclusions: Scleral contact lenses offer a comprehensive solution for patients with diverse pathological histories, providing stable optics and surface protection. However, it is important to maintain the stability of the implanted Express valve.
Losartán Tópico Como Tratamiento En Defectos Epiteliales Corneales: Una Revisión Sistemática De La Literatura
(Universidad Santo Tomás, 2025-12-19) Silva Garcia, Laura Estefany; Suarez Prada, Juan David; Narváez Rumie, Olivia Margarita; Universidad Santo Tomás
Objective: To bibliographically characterize and analyze the therapeutic effects and safety of topical losartan in the cornea, based on evidence published in the last ten years. Methodology: Systematic literature review in indexed databases Embase, ProQuest, Scielo, ClinicalKey, PubMed, and Scielo, using MeSH and DeCS descriptors in Spanish and English, in combination with Boolean operators, including studies from 2015 to 2025, with in vivo experimental design method, human clinical reports, or case series, in full text in Spanish or English. Articles with in vitro method, without methodological data, duplicates, or older than 10 years were excluded. Finally, 7 articles were included. Results: The included studies were published between 2022 and 2025, all in English. Three of these were developed with experimental models in rabbits and four with clinical studies in humans. The most commonly used concentration was 0.8 mg/ml with a frequency of 6 times a day, following progressive reduction schemes in prolonged treatments. In animal models, losartan managed to decrease the generation of myofibroblasts, attenuating corneal fibrosis, having greater efficacy in early or less complex lesions. In established fibrosis, it showed apoptosis of myofibroblasts and a tendency to stromal clearing, having modest haze reduction in the short term. In human clinical cases, patients experienced improvement in corneal transparency and visual acuity even when steroid treatment had failed. There were no reports of adverse events. Conclusions: Topical losartan is a possible alternative to the treatments of corneal fibrosis and scarring, showing efficacy in studies in animals and humans.
Adaptación de lente de contacto rígido de apoyo escleral en paciente con queratoplastia penetrante secundaria a úlcera corneal por uso excesivo de lentes de contacto blandos, en clínica oftalmológica de Bogotá, Colombia. 2025. Reporte de caso
(Universidad Santo Tomás, 2025-12-17) Reyes Figueredo, Laura Sofía; Forero Feo, Luisa Fernanda; Martínez Rodríguez, Ingrid; Universidad Santo Tomás
Introduction: penetrating keratoplasty (PK) is a procedure used to restore corneal transparency in advanced cases of structural damage, with postoperative corneal irregularity being a common cause of visual decline. Scleral lenses represent an effective therapeutic tool for visual rehabilitation in these patients. Objective: to adapt a scleral contact lens in a patient with penetrating keratoplasty secondary to a corneal ulcer in the left eye caused by excessive use of soft contact lenses. Methodology: descriptive observational study in the form of a case report, in which an AirKone Scleral ATD lens was fitted in the left eye with satisfactory outcomes. Case Presentation: a 43-year-old female patient with a history of PK and intraocular lens implantation in the left eye secondary to a corneal ulcer. A comprehensive optometric evaluation, corneal tomography, and ocular surface assessments (Pentacam and Keratograph 5M) were performed. Based on the clinical findings, a definitive scleral lens was calculated and fitted following the manufacturer’s recommended parameters and applying the necessary clinical adjustments. Results: the adaptation of the AirKone Scleral ATD lens allowed the patient to achieve a visual acuity of 20/20 at distance and 0.50M at near, with good tolerance for 4–6 hours of daily wear in the left eye, without significant vascular compression or early complications. Conclusion: the adaptation provided visual rehabilitation and relief of dry-eye symptoms, though close monitoring is required due to the low endothelial cell count (901.7 cells/mm²). This case supports the scleral lens as a safe option in transplanted corneas when design, wearing time, and graft evolution are carefully controlled.
Adaptación de lente de contacto rígido de apoyo escleral en paciente con queratocono grado IV en Bogotá, Colombia, 2025: Reporte de caso
(Universidad Santo Tomás, 2025-11-25) Flórez Cifuentes, Adriana Camila; Vargas Velasco, Jorge Giovanni; Universidad Santo Tomás
Keratoconus is a progressive corneal ectasia that alters the shape and biomechanics of the cornea, significantly compromising visual quality (1). In advanced stages, corneal irregularities limit the effectiveness of ophthalmic lenses and conventional contact lenses. For this reason, scleral contact lenses represent an effective therapeutic alternative, as they provide visual rehabilitation, optical stability, and corneal protection, even in corneas with high keratometric values or pronounced irregularity (2). Objective: To determine the optimal fitting of scleral support contact lenses in a patient diagnosed with grade IV keratoconus in Bogotá, Colombia, during 2025, through the analysis of a clinical case report. Methodology: A descriptive observational study based on a clinical case was conducted. A comprehensive optometric assessment, complementary diagnostic testing, and scleral contact lens fitting were performed in a patient with bilateral grade IV keratoconus. Case description: A 31-year-old female patient with advanced ectasia and a history of unsuccessful adaptations with ophthalmic lenses and soft contact lenses, along with ocular surface findings that explained the poor outcomes of previous fittings. Results: The adaptation of scleral lenses in both eyes resulted in a significant improvement in visual acuity, with adequate stability, centration, and uniform fluid reservoir distribution, without corneal touch or adverse effects. The patient reported greater comfort and enhanced functional visual quality after the adaptation process. Conclusions: Scleral support contact lenses are an effective visual rehabilitation option for patients with grade IV keratoconus, particularly when other correction methods have not yielded satisfactory results. Their ability to improve optical quality and protect the ocular surface makes them a valuable therapeutic alternative in advanced ectatic disease
Comportamiento de lente de contacto limbal y APC para el Manejo de un paciente con queratocono en Tuluá, Valle en 2025: reporte de caso
(Universidad Santo Tomás, 2025-07-17) Giraldo Arias, Valeria Fernanda; Gutierrez Lopera, Sandra; Moron Barreto, Maria Catalina
Keratoconus is considered a bilateral and asymmetrical ocular disease that causes progressive thinning and steepening of the cornea, leading to irregular astigmatism and reduced visual acuity (1). The thinning of the cornea occurs in the central or paracentral area, most commonly in the inferotemporal zone (2). As the condition progresses, conventional solutions such as the use of spectacles become less effective in restoring patients' visual acuity. Objective: To evaluate the performance of large-diameter limbal gas permeable contact lenses and peripheral asphericity designs in the management of keratoconus. Methodology: Clinical case report Case presentation: This report presents the clinical case of a 22-year-old patient from Tuluá, Valle del Cauca, diagnosed with keratoconus and who underwent penetrating keratoplasty in the right eye three years ago. The patient had multiple ophthalmology evaluations but had not been fitted with any optical correction for the condition. Results: A large-diameter limbal gas permeable contact lens and a lens with peripheral asphericity were fitted in both eyes. Good visual acuity was achieved with both lens designs, but one of them provided limited visual comfort. Conclusions: The use of the contact lens in the right eye was discontinued. Each design used was selected considering the patient's budget. The Quantifiable Peripheral Asphericity (QPA) lens provided adequate visual acuity improvement but was not suitable in terms of comfort
Comparación entre sistemas de estabilización de prisma de balastro y estabilización acelerada de lentes de contacto blandos tóricos: reporte de casos
(Universidad Santo Tomás, 2025-05-10) Galarza Nuñez, Johanna; Narváez Rumié, Olivia
Monthly replacement toric soft contact lenses for the correction of corneal astigmatism may experience increased rotation during blinking or due to external factors, altering the vision and comfort of patients wearing these medical devices. Objective: To describe the rotational stability between ballast prism and accelerated stabilization designs of toric soft contact lenses in two patients with low astigmatism. This is a case report. Methodology: The study design is observational, descriptive, comparative, case report-type. The population consisted of two female patients with average ages of 25 and 26 years, selected based on inclusion criteria at the Optometry Clinic of Santo Tomas University in Bucaramanga. The selected patients presented low astigmatism with an average of +/- 1.50 diopters (Dpt) of refractive cylinder, with no evidence of pathologies compromising the anterior segment and extraocular adnexa in the study. Corrected visual acuity, refraction, corneal topography, stability examination, and tear secretion were recorded using the BUT and Schirmer tests. Static-dynamic movement and rotation of toric soft contact lenses with different stabilization designs were assessed by biomicroscopy; the satisfaction or comfort test was also performed. Conclusions: According to the report, the design that presented the least rotation and the greatest tolerance for the study patients was the accelerated stabilization system for the correction of low-measure corneal astigmatism.
Adaptación de lente de contacto rígido de apoyo escleral en paciente adulto con diagnóstico de queratocono unilateral en Bogotá, 2024: Reporte de caso
(Universidad Santo Tomás, 2025-05-16) Hincapie Mateus, Mateo Alberto; Palencia, Diana Cristina; Martinez, Ingrid Maritza
Keratoconus (KC) is a bilateral and progressive eye disease that thins and deforms the cornea, causing irregular astigmatism, decreased visual acuity and myopia (1). Due to the limitations of traditional treatments, innovative options have been developed, such as scleral contact lenses, which offer better visual correction and greater comfort. (6). Objective: To determine the ideal adaptation that allows visual rehabilitation with a scleral lens in an adult patient diagnosed with unilateral keratoconus. Methodology: Case description study. Where a scleral support contact lens is satisfactorily fitted to a patient with unilateral keratoconus in the right eye. Case description: A 31-year-old male patient, resident of Bogotá, was diagnosed with keratoconus in the right eye 3 years ago. Clinical management: Intermittent user of corneal rigid gas permeable contact lenses (RGCL) for 4 years, low tolerance and discomfort. Results: A Rose K2 XL scleral-supported rigid contact lens was adapted, achieving visual comfort with a schedule of 6 hours a day good visual acuity in the right eye at far and near (distance vision 20/40 (Snellen) and near vision (1.00 M). Conclusions: Scleral-support lenses maximize vision function, being at the same time an option compared to the low tolerance and adherence to treatment in other designs and materials, thanks to their solution reservoir within the lens that makes it possible to regularize the surface and recover visual function
Adaptación de lentes de contacto de apoyo escleral en paciente post queratotomía radial e indicación de trasplante, reporte de caso
(Universidad Santo Tomás, 2025-05-08) Guerra Rodriguez, Emely; Unigarro Chamorro, Tatiana Nicole; Narvaez Rumie, Olivia Margarita
The surgical technique called radial keratotomy (RK) involves making 4 to 8 deep radial incisions (90% of the corneal thickness) in the periphery of the cornea using a mechanical diamond knife that flattened the central cornea to reduce its curvature (1). Objective: To describe the adaptation of scleral contact lenses in a patient after radial keratotomy and with indication for keratoplasty. Methodology: Descriptive, observational, cross-sectional study, with a single male patient, 34 years old, diagnosed with keratoconus in both eyes and indication for corneal transplant for the right eye. Case description: This is a male patient, 34 years old, who 17 years ago underwent the Radial Keratotomy procedure in both eyes. Among the patient's ocular pathological history, it was found that since 2016 he had an indication for a corneal transplant for his right eye, he had a failed adaptation of rigid gas permeable contact lenses for his right eye, of which he reports discomfort and that the lens came out of his eye. Currently the patient does not use optical correction of any kind, therefore, the previous examinations and the subsequent adaptation of specialized lenses will be carried out. Results: The evaluated patient reported total comfort with the lens provided, in addition to excellent visual acuity of 20/25 in distance vision with the Snellen chart and 0.5m in near vision with the Jaegger chart. Conclusion: This study provides more evidence on the effectiveness of scleral support lenses in visual correction and on the comfort that patients experience when using these lenses over other correction options in cases of corneal ectasias after refractive surgery
Reporte de caso: adaptación de lentes de contacto rígidos de apoyo escleral Custom Stable en paciente con distrofia corneal de Meesmann en Medellín, en 2025.
(Universidad Santo Tomás, 2025-05-07) Martínez Rodríguez, José David; Narváez, Olivia Margarita; Martínez, Ingrid
Corneal dystrophies are hereditary, bilateral, symmetrical, and slowly progressive conditions associated with systemic or environmental factors (1). Meesmann corneal dystrophy is characterized by multiple gray epithelial vesicles resembling bubbles, which may cause photophobia, ocular irritation, and blurred vision due to corneal surface irregularities and scarring following vesicle rupture (2). While rigid contact lenses are commonly used to manage corneal irregularities, direct contact with the cornea can be counterproductive in such cases; therefore, scleral lenses offer a safe and effective alternative by resting on the sclera without touching the cornea (3). Objective: To document the fitting of a Custom Stable scleral rigid gas-permeable contact lens in a patient with Meesmann corneal dystrophy. Methodology: A descriptive observational cross-sectional study, presented as a case report, in which Custom Stable scleral lenses were fitted in both eyes. Case report: A 22-year-old male student, wearer of rigid gas-permeable contact lenses for five years without changes in the past three, was previously diagnosed with Meesmann corneal dystrophy in both eyes seven years ago. He presented with high myopia, significant astigmatism, and a visual acuity of counting fingers at 40 cm in both eyes. Results: After fitting the scleral lenses, the patient achieved 20/30 visual acuity for both distance and near vision, along with a significant improvement in visual comfort. Conclusions: Scleral lenses, by avoiding direct corneal contact and resting on the sclera, are an effective option for patients with intolerance to conventional designs or with corneal surface abnormalities, promoting successful adaptation and enhanced comfort.
Variación de la presión intraocular en la práctica de tenis de campo en segunda y tercera categoría de la academia de tenis Cartago en la ciudad de Cartago-Valle durante el primer semestre de 2024
(Universidad Santo Tomás, 2025-04-29) Iglesias Bustos, Jose Daniel; Cardona Acevedo, Daniela; Cardona Guiral, Yessica Johanna; Narváez Rumié, Olivia Margarita
Intraocular pressure is a factor of great importance in the proper functioning of the eyeball. This variable nourishes structures such as the cornea and lens and its changes can even affect structures of the posterior segment. Intraocular pressure can be affected by various factors, including exercise. These changes could lead to important alterations in various ocular structures. Objective: Analyze the behavior of intraocular pressure during the practice of field tennis in the second and third categories of the Cartago tennis academy during the first semester of 2024. Method: observational, descriptive cross-sectional study. Non-probabilistic convenience sampling was used. Intraocular pressure was evaluated in 44 participants before and after field tennis practice. Results: the age range was 20 to 44 years with a mean of 31.84 years ± 5.70 years. There was an average decrease in intraocular pressure after field tennis practice of 1.67 mmHg for the right eye and 1.5 mmHg for the left eye. Conclusions: there was a decrease in intraocular pressure values after playing field tennis
Evaluación del comportamiento de lente escleral en paciente de 20 años con queratocono grado 4 con adaptaciones de lentes de contacto fallidas y candidato a trasplante de córnea desde el 2016: reporte de caso en Bogotá 2024
(Universidad Santo Tomás, 0025-04-08) Chaparro Parra, Zara Manuela; Narváez, Olivia Margarita
This section gives a very reduced account of the most important content of the scientific article. Keratoconus is a disease characterized by progressive thinning of the cornea, resulting in irregular astigmatism and visual loss. It often develops during adolescence or childhood and may affect one or both eyes. Treatment varies according to severity. In advanced cases, such as a patient with grade 4 keratoconus, transplantation is an option, but scleral lenses may offer a solution to improve visual quality of life without surgical intervention. We present an observational descriptive study of a 20-year-old male patient with grade 4 keratoconus in the right eye and grade 3 in the left eye, where a scleral contact lens was adapted with a satisfactory result giving the patient the proper management avoiding a surgical process
Uso de lente terapéutico y membrana amniótica y su efectividad en trastornos de superficie ocular: revisión de literatura
(Universidad Santo Tomás, 2025-03-28) Bonilla Arévalo, Juan Nicolas; Gómez Rodríguez, Karen Daniela; Quintero Murillo, María Fernanda; Narváez, Olivia Margarita; Silva, Martha Lucía
Objective: To determine the effectiveness of the combined use of therapeutic lens and amniotic membrane in ocular surface disorders, as reported in the literature in the last 10 years. Methodology: A secondary study was conducted in the form of a systematic review of the literature, which included research with information related to ocular surface disorders and their management with amniotic membrane and therapeutic contact lens. To obtain the information, different search equations are built to search databases such as: PubMed, scopus, Taylor & Francis, Nature, ClinicalKey, Science Direct, Sage Journals, Ovid, DialNet, Lilacs, SpringerLink, ProQuest, Redalic, Scielo, embase, Jama Network and other free search databases. From the articles, information was extracted regarding the bibliometric data of the articles (author, year, country, language, and type of study) and clinical data in relation to the healing time of the cornea, visual outcome, pathology treated, and the type of intervention performed. Results: ten articles that met the inclusion criteria were extracted; of which six were in English, two in Chinese, and two in Korean. Eighty percent corresponded to prospective studies and 20% to retrospective studies. The results were quite heterogeneous, from the variability in tissue recovery time, ranging from 3 days to 30 days, as reported by seven studies and another three that also affirm improvement of the condition presented. A remarkable rate of complete recovery and improvement in visual acuity after treatment are also reported. Among the pathologies that were treated are persistent epithelial defects, punctate keratitis, acute chemical injury to the cornea, dry eye disease, corneal ulcer, post PRK corneal scarring and other surface conditions. Conclusions: Other therapeutic options are presented to manage various ocular surface alterations. However, better results are obtained in superficial lesions and symptoms when the amniotic membrane is supported with a therapeutic lens.

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