Especialización Segmento Anterior y Lentes de Contacto
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Ítem 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 MargaritaThis 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 processÍtem 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 LucíaObjective: 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.Ítem Quemadura de córnea con látex de banano en ojo derecho en 2024: Reporte de caso(Universidad Santo Tomás, 2025-03-27) Cardozo Calderón, Yessica Alexandra; Pérez Sánchez, Rafael Eduardo; Narváez, Olivia MargaritaObjective: Prepare a case report of a corneal burn with banana latex in 2024, in Urabá, Antioquia. Results: The case of a 54-year-old male patient is presented, who was referred for consultation due to a chemical corneal burn caused by contact with banana latex in the right eye. Initial symptoms included severe pain, photophobia, and blurred vision. During the ophthalmological examination, lesions were diagnosed that compromised corneal transparency and significantly affected vision, with partial visual recovery after treatment. Conclusions: This case highlights the importance of an early and accurate diagnosis in chemical corneal burns, since timely intervention can improve visual prognosis and prevent long-term complicationsÍtem Reporte de caso: adaptación de lente de contacto rígido de apoyo escleral con diseño customisado en paciente con queratocono grado dos posts quirúrgicos de cross-linking con intolerancia a diseños convencionales en Bucaramanga, en 2024.(Universidad Santo Tomás, 2025-01-21) Carvajal Castillo, Jasney Briyid; Cervantes Canchila, María Andrea; Daza Martínez, Camilo LuisKeratoconus is a pathological change characterized by corneal thinning that can be genetic or acquired throughout life, it is progressive and asymmetric in most cases Objective: To adapt a rigid contact lens with scleral support with custom design in a patient diagnosed with oval keratoconus grade II in the right eye and grade 2. 3 in left eye, post-surgical Cross Linkig and intolerance in the adaptation to conventional designs in Bucaramanga 2024 Methodology: Descriptive observational study of cross-sectional case report type. Where X-CELL ATLANTIS 2.0 contact lens is adapted to a patient with keratoconus grade 2 in both eyes satisfactorily. Case description: 28 year old male patient with a corneal ectasia keratoconus type grade 2 in the right eye and grade 2-3 in the left eye, and significant variation in diopters higher in the left eye, without successful experiences in their previous adaptations with rigid contact lens corneal support and soft contact lenses, in addition. The patient had a pathological diagnosis in ocular surface and anterior segment that led to the rejection of these adaptations; due to this, it was decided to adapt a rigid contact lens with scleral support in order to improve visual quality and ocular surface symptomatology. Results: Scleral support rigid contact lens with customized design (X-CELL ATLANTIS 2.0) was adapted, achieving visual comfort, complete improvement of distance and near visual acuity (20/20 in both eyes). Conclusions: Scleral-supported rigid contact lenses due to their corneal jumping characteristics and soft landing in the scleral zone offer invaluable visual comfort for the patient that allows rapid adaptation and tolerance over time, they are an excellent alternative in cases where there was rejection to adaptations with conventional designs.Ítem Abordaje de un paciente con queratocono, extrusión de anillos intraestromales y adaptación de lentes de contacto: reporte de caso(Universidad Santo Tomás, 2025-01-21) Peña Malagón, Yurley Andrea; Suárez Álvarez, Lady Johanna; Daza Martínez, Camilo Luis; Narváez Rumie, Olivia MargaritaKeratoconus is a condition that produces asymmetric irregular astigmatism and usually appears in the second decade of life affecting the patient's development due to the visual distortion it causes (1). Objective: To report the case of a patient diagnosed with keratoconus, crosslinking and extraction of intrastromal rings, to identify and understand the clinical and functional behavior of the adaptation of specially designed contact lenses as an alternative to keratoplasty. Methodology: Descriptive observational study type case report. A description is made of a 43 year-old female patient with a history of keratoconus, crosslinking, implantation of intrastromal rings and subsequent extrusion of these causing corneal irregularity. The results obtained are shown where two types of contact lenses were evaluated: rigid corneal and scleral support. The first one showed a better fluorographic pattern and comfort, a good tolerance on the scleral that, despite being a comfortable lens, presented an excessive clearance in the paracentral area corresponding to the ring extraction area, pinching and compression zones; it was decided to test a readaptation of a rigid gas permeable lens to assess tolerance and vision to promote corneal oxygenation. Conclusions: This report shows how it is possible to use a simpler design prioritizing corneal integrity, and avoiding hypoxia to ensure good tolerance; therefore, in this case, it is considered that the rigid corneal lens is a good option since if the corneal irregularity is marked, it makes the adaptation of the scleral difficultÍtem Adaptación de lente de contacto rígido de apoyo escleral en paciente pediátrico con diagnóstico de queratocono avanzado. Reporte de caso.(Universidad Santo Tomás, 2025-01-20) Sanchez Marroquin, Juan Sebastian; Martinez Rodriguez, Ingrid MaritzaKeratoconus (KC) is defined as a corneal ectasia caused by progressive corneal curvature accompanied by thinning of the apical stroma (1), which can present as unilateral or bilateral, depending on the case. It typically manifests in the second decade of life and stabilizes in the fourth decade (2). As corneal deterioration progresses, conventional refractive methods become ineffective, making the use of Scleral Lenses (SL) significant. Objective: To determine the ideal adaptation for visual rehabilitation with scleral lenses in a pediatric patient diagnosed with advanced keratoconus. Methodology: Descriptive observational study, case report of a pediatric patient with a diagnosis of advanced keratoconus. Case presentation: A 16-year-old female patient, resident of Bogotá, diagnosed with advanced keratoconus in both eyes for 2 years. Clinical management: Ophthalmological evaluations with future surgical treatment options, including Keratoplasty (KP). Contact lens fitting and adjustments with Rigid Gas Permeable lenses (RGP) by optometry without adherence to treatment for 2 years. Results: SL (Custom Stable Elite) were fitted, achieving visual comfort for 8 to 10 hours daily and good visual acuity for both distance and near (20/30 in both eyes). Conclusion: Scleral lenses provide new alternatives compared to RGP contact lenses in irregular corneas, offering greater comfort and maximizing visual function in the pediatric population, ultimately delaying the need for QP.Ítem Relación Entre Defecto Refractivo Y Amplitud Del Ángulo Camerular Con OCT Maestro II En Pacientes De 30 A 60 Años En Una Institución De Salud En Cartagena, Entre 2019-2023(Universidad Santo Tomás, 2025-01-21) Moreno Franco, Linda Fernanda; Gonzalez Zambrano, Mayra Alejandra; Narváez Rumié, Olivia MargaritaThe relationship between the optical components of the eye and their dimensions influence the magnitude of refractive errors and the interaction of the different structures. Anterior segment optical coherence tomography (AS-OCT) can be used to objectively evaluate the angle and morphometrically calculate its dimensions. OBJECTIVES: To establish the relationship between refractive parameters and chamber angle amplitude, to determine if there is a potential risk factor for the presentation of primary angle closure. RESULTS: In this quantitative, observational, analytical, cross-sectional study, data from 148 eyes of 75 patients, 55 women and 20 men, aged between 30 and 60 years, were evaluated. Of 148 eyes, 56.75% had hyperopic astigmatism and 41.90% had hyperopia. The correlation analysis showed a negative relationship between the refractive value (S.E) and the angle opening. They also showed a positive relationship (Pearson 0.052 and 0.113) between intraocular pressure and the age of the patient. And strong positive correlation between the TIA measurement and the AOD 500 (Pearson 0.935, 0.746, 0.760, 0.905). In addition, negative relationship between the age of the patient and the angle opening. CONCLUSIONS: The TIA and AOD 500 measurements have a high correlation with each other. The amplitude of the anterior chamber tends to decrease with increasing age of the patient and the values of intraocular pressure tend to increase. However, the refractive status of the patient does not manage to be a predictor of the amplitude of the chamber angleÍtem Optimizando la visión con lentes de contacto especiales en paciente con queratocono e indicación de queratoplastia corneal: Reporte de caso(Universidad Santo Tomás, 2025-01-17) Blanco Pinto, Johan Manuel; Leal Jaimes, Fabián Mauricio; Daza Martinez, Camilo LuisKeratoconus is a corneal disease that compromises the biomechanical integrity of the cornea, leading to structural changes that cause significant visual impairment, affecting both the quality and quantity of vision. Objective: This study aims to report the case of a patient with keratoconus and an indication for corneal keratoplasty, with the goal of optimizing visual quality using specially designed contact lenses Methodology: This is an observational and descriptive case report. Case Presentation: A 37-year-old male patient from Pamplona, Norte de Santander, was evaluated. He had a history of intracorneal ring surgery in the right eye 12 years ago, which achieved good visual acuity with optical correction. During his most recent follow-up with a cornea specialist ophthalmologist in December 2023, he was diagnosed with stage 4 keratoconus. Corneal keratoplasty was recommended for the left eye due to poor visual acuity despite optical correction. The patient reported no previous adaptations with contact lensesÍtem Complicaciones corneales como consecuencia del uso de lentes esclerales(Universidad Santo Tomás, 2024-12-15) Peña Rodríguez, William Andrés; Santos Rueda, Zulma Samara; Narváez Rumie, Olivia MargaritaScleral contact lenses are an excellent alternative for visual correction in irregular corneas and the management of ocular pathologies. Despite their benefits, they can induce changes in ocular physiology, such as edema, epithelial and endothelial bullae, infectious and non-infectious keratitis, among others. The objective of this study was to analyze the results through a systematic review of the factors associated with and complications arising from the use of scleral lenses, and their relationship with other conditions that may destabilize the anatomical and physiological integrity of the cornea, leading to an imbalance in its functioning. A review of publications from 2010 to 2024 was conducted using the databases PubMed-Medline, Embase, ScienceDirect, and Scopus, and evaluated using the PRISMA scale. After applying the filters, a total of 603 articles were identified, with 16 preselected according to the inclusion and exclusion criteria. The most documented corneal complication was edema, reported in 10 of the studies, representing 62.5% of the total included studies. It is estimated that these complications arise due to inadequate oxygenation and the interaction between the cornea and the lens, as well as improper cleaning methodsdissemination media for its preparation, since it is considered that it should not exceed the interval 150-250 characters.Ítem Reporte de Caso: Adaptación de Lentes de Geometría Inversa en Paciente con Cornea Irregular Posterior a Múltiples Cuerpos Extraños(Universidad Santo Tomás, 2024-11-27) Ramírez Torres, Valentina; Atencia Pinzón, Omar Alberto; Narváez Rumié, Olivia Margarita; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001493289; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0002017814; https://scholar.google.com/citations?hl=es&user=qGsA_30AAAAJ; https://orcid.org/0000-0001-6203-4669; https://orcid.org/0000-0001-9074-2478The adaptation of rigid gas permeable contact lenses has become a correction alternative that provides visual improvement in cases of irregular corneas, they are usually used in corneal ectasias or other alterations within which keratoconus is mainly found, however said This resource can also be used in cases where there is a change in corneal geometry, however, difficulty could be evident in the positioning and tolerance of the contact lens due to the choice of spherical designs; This situation denotes the importance of exploration in other types of designs such as inverse geometry designs. Below, we present the case of a 56-year-old patient with a mechanical profession who attends consultation reporting poor distance and near vision that does not improve with glasses, presence of several corneal leucomas and scissor shadows accompanied by a very irregular topographic pattern. A test was carried out with rigid gas permeable contact lenses of spherical design, finding a significant improvement in visual acuity but with significant difficulties during adaptation such as lens decentration and excessive lifting of the edges accompanied by discomfort on the part of the patient, for example. Therefore, a change in the design is made to one of reverse geometry, achieving a vision of 20/33 in each eye and 20/25 binocularly. This demonstrates the importance of knowledge and management of unconventional contact lens designs that can help improve fits.Ítem Manejo con Lente de Contacto Escleral en Queratoglobo Postquirúrgico de Queratoplastia Penetrante con 20 Años de Evolución: Reporte de Caso en Bogotá del Año 2023(Universidad Santo Tomás, 2024-09-02) Briñez González, Juan Esteban; Gómez Osorio, David Steven; Narváez Rumié, Olivia Margarita; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001493289; https://scholar.google.com/citations?hl=es&user=qGsA_30AAAAJ; https://orcid.org/0000-0001-6203-4669Keratoglobus is a rare bilateral corneal alteration, it affects patients of both sexes, it causes thinning and generalized corneal protrusion. This condition generates variations in Bowman's layer and stroma, which produces the presentation of visual and ocular difficulties. Objetive: establish management with a scleral contact lens in a patient with keratoglobus after penetrating keratoplasty surgery with 20 years of evolution, in Bogotá. Methodology: Descriptive observational study, case report of a patient with keratoglobus in the eye with penetrating keratoplasty performed in an ophthalmological clinic in Bogotá in 2023 Results: A scleral contact lens of toric design with a diameter of 16.50mm was fitted, where it was necessary to make two changes in the right eye and 1 in the left in order to reach a final functional lens, despite achieving visual acuity 20/20 in each eye, 100% optimal scleral support was not obtained due to high scleral asymmetry. Conclusions: It was possible to adapt scleral contact lenses and thus manage the patient diagnosed with post-surgical keratoglobus.Ítem Caracterización del Queratocono en un Consultorio Oftalmológico Especializado en Cornea de la Clínica de Oftalmología de Cali Durante Enero de 2015 a Diciembre de 2021(Universidad Santo Tomás, 2023-07-13) Martínez Mora, Yuri Katherin; D´ Antone, Valeria Andrea; Narváez Rumié, Olivia Margarita; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001493289; https://scholar.google.com/citations?hl=es&user=FHr8PjcAAAAJ; https://scholar.google.com/citations?hl=es&user=qGsA_30AAAAJ; https://orcid.org/0000-0001-6203-4669Introduction: Keratoconus, pellucid marginal degeneration (PMD), keratoglobus and post-refractive surgery progressive corneal ectasia should be classified as "ectatic diseases". Keratoconus is characterized by progressive corneal thinning and protrusion that leads to an exaggerated increase in its curvature that generally occurs asymmetrically leading to astigmatic defects. In Colombia there are few studies on the prevalence of keratoconus, this being a condition that, if not treated, can cause visual impairment, affecting the patient's quality of life. Objective: To clinically characterize the cases of keratoconus in an ophthalmology clinic specialized in cornea of the Cali ophthalmology clinic from January 2015 to December 2021. Study design: Observational descriptive retrospective cross-sectional Method: Review of medical records of patients seen for the first time in a private office of the Cali ophthalmology clinic, the estimated sample calculation was 263 histories. Results: The presence of keratoconus in the male sex is statistically significant, coinciding with the existing bibliography. Corneal crosslinking is one of the most used and safe treatments in the management of keratoconus. Conclusions: The posterior elevation map is key to making an early diagnosis of keratoconus. It is suggested to expand the research to multicenter studies.Ítem Cambios Tomográficos y de Agudeza Visual con Implante de Segmentos Intraestromales en Pacientes con Queratocono Intervenidos en una Institución de Salud Visual en la Ciudad de Bogotá, Entre el Año 2018 y 2019(2021-05-26) Cadena Castro, Natalia; Daza Campos, Edgar Nicolas; Rosales Munar, Ana Lucia; Rosas Apraez, Jesús Andrés; Palencia Flórez, Diana Cristina; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0000897574; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001474953; https://scholar.google.com/citations?hl=es&user=tU0OqRUAAAAJ; https://orcid.org/0000-0003-0915-3348Descriptive epidemiological study of a series of cases, of patients with keratoconus, operated on with Intacts. The variables were visual acuity, corneal astigmatism, asphericity, corneal apex, and thinnest point of the cornea. An increase in K1 (0.67D) and a decrease in K2 (-2.32D) were evidenced, the apex showed a flattening of less than 1 diopter, while pachymetry and asphericity did not show changes. Uncorrected visual acuity improved more in the male population. The implant improves visual acuity without correction, demonstrating the effectiveness of the surgical technique by regularizing the shape of the cornea.Ítem Efecto del Uso de Lentes de Contacto Terapéuticos en Patologías de Segmento Anterior con Relación a la Sintomatología Percibida. Revisión de Literatura(2021-03-12) Rojas Robles, María Paula; Rodríguez Reyes, Karen Nathalie; Palencia Flórez, Diana Cristina; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001474953; https://scholar.google.com/citations?hl=es&user=tU0OqRUAAAAJ; https://orcid.org/0000-0003-0915-3348Introduction: The adaptation of contact lenses is a frequent optometric practice thanks to the multiple benefits that its adaptation brings, even though its use is not without complications due to the permanent interaction with the physiology of the ocular surface. Generally, they are used for the correction of ametropia and good visual functioning, however, at present they are considered among the treatment options in pathologies of the anterior segment thanks to their protection functions, drug reservoir, bandage action, corneal healing, structural support, hydration and cosmetic aid. For this reason, they could be used in various ocular pathologies that can become a frequent reason for consultation in clinical practice. Objective: To identify the uses of therapeutic contact lenses in pathologies of the anterior segment, as reported in the literature. Methodology: Publications in Spanish, English and Portuguese were obtained from search equations such as “Therapeutic contact lenses” AND “Anterior segment pathologies”, “Therapeutic contact lenses”. Articles published in the last 20 years were retrieved, found in more than five indexed databases, in gray literature, documents developed with methodology such as literature reviews, cases and controls, reports and series of cases. Bibliometric variables were reported (year, language of publication, type of study, etc.) and thematic variables (anterior segment pathologies or procedure in which it is indicated). Results: Approximately 70% of the articles consulted show that the soft contact lens is the most used for therapy and treatment of the ocular surface, followed by scleral contact lenses. On the other hand, 57% of the publications show the use of therapeutic contact lenses for the management of dry eye; and in most studies, the visual acuity of the evaluated subjects improves significantly despite not being the main objective in the therapeutic adaptation of contact lenses. Conclusions: Therapeutic contact lenses are useful in different ocular surface diseases and are indicated mainly to relieve pain, heal corneal wounds, promote corneal healing and epithelial regeneration, protect anterior segment structures, improve and stabilize visual acuity.Ítem Prevalencia de Patologías del Segmento Anterior, en Adultos Mayores, Atendidos en los Hogares Geriátricos del Municipio de San Carlos de Guaroa, Departamento del Meta, Durante el Primer Semestre del Año 2019(2021-02-06) Castro Dousdebés, Magda Yineth; Chicangana Vesga, Yessica Alejandra; Pérez Galvis, Yeiny Yuliana; Acevedo Acevedo, Helga Rocío; Palencia Florez, Diana Cristina; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001474953; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001419567; https://scholar.google.com/citations?hl=es&user=tU0OqRUAAAAJ; https://orcid.org/0000-0003-0915-3348In first place, the purpose of this study is to determine the prevalence of ocular pathologies of the anterior segment, in patients over 60 years of age, who are treated in geriatric homes of the Municipality of San Carlos de Guaroa – Department of Meta, in the first half of the 2019. For that reason, methodologically 104 people were evaluated in a cross-sectional descriptive observational study, a study carried out in four different locations where municipal geriatric homes operate, namely: in the municipal seat, Vereda inspection to Palmera, Vereda Surimena and Corregimiento Pajure, directly in The Municipality of San Carlos de Guaroa in Meta. Performing an optometry evaluation, based on biomicroscopy (Camera angle shot with Van Herick's technique, review of each ocular structure of the anterior segment, this with the help of the slit lamp) and also the diagnostic test for dry eye (But, Schirmer and Lysamine Green test). In conclusion, the prevalence of pathologies of the previous segment was established in patients aged over 60 years, in the Municipality of San Carlos de Guaroa, Department of Meta in the first half of 2019, among those with the highest frequency it is possible to name: Dermatochalasis with 97.3% (98 Patients), Gerontoxon in 61.5% (64 Patients), Pinches in 56.7% (59 Patients), Pterygiums in 53.8% (56 Patients), Cataract in 53.8% (56 Patients) and Dry Eye in 40.4% (42 Patients).Ítem Caracterización del Índice de Protección Ocular en Trabajadores Administrativos, Usuarios de Computador Durante el Año 2019(2020-08-20) Echeverría Bravo, Verónica Marcela; Reyes Acero, Michel Juliana; Sanabria González, Germán Darío; Palencia Flórez, Diana Cristina; Giraldo Mendivelso, Martín Edisson; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001192990; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001474953; https://scholar.google.com/citations?hl=es&user=i5uJ8L0AAAAJ; https://scholar.google.com/citations?hl=es&user=tU0OqRUAAAAJ; https://orcid.org/0000-0002-9790-6161; https://orcid.org/0000-0003-0915-3348The importance of blinking and the quality of the tear film in the prevention of occupational eye diseases is evident, since, at the workplace, most activities require a high degree of concentration that reduces the frequency of blinks in an occupational setting. minute. Objective: Establish the ocular protection index in computer user administrative workers, Likewise, evaluate clinical characteristics of the ocular surface, sociodemographic and environmental, and determine the blink frequency and tear rupture time together with the time and interval of pauses visual assets in computer users, as well as the hours of use of the same. Materials and methods: A type of quantitative, observational, descriptive cross-sectional study was carried out, where the IBI (blink interval) and BUT were determined for each participant, relating their results through the eye protection index, in addition to other clinical and sociodemographic variables in computer users in the administrative area of Bucaramanga. Results: 52 computer user workers were evaluated where 68% belonged to the female gender. In the same way, the ocular surface made up of three components was evaluated, the first of them, BUT presenting altered in 16.66% of the eyes. Conclusions: The ocular protection index in computer user administrative workers is shown below normal values, in the same way it is evident that as age increases there is a tendency to decrease in the BUT, Schirmer, meniscometry and Blincometry values Key words: Eye protection index, Break up time, blincometry, computer user syndrome.Ítem Evaluación de la Concordancia Entre la Prueba de Schirmer I y la Prueba de Schirmer Modificado de 1 Minuto en Estudiantes Universitarios(2019-10-24) Barrera Castro, Juan David; Rojas Ospina, Daniel Andrés; Herrera Rivera, Sandra Milena; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001743104; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0002098025; https://orcid.org/0000-0002-0155-1854Introduction: The tear film is a fundamental component in the visual system, it has important functions such as lubricating, oxygenate and protect against infectious agents. The instability of the tear film generates problems of vision quality and a number of complications that affect visual health. Dry eye is a complex multifactorial disease of the tear film and ocular surface characterized by symptoms such as lack of comfort, impaired vision and instability of the tear film that can cause potential damage to the ocular surface. The Schirmer I test consists of inserting the end of a strip of blotting paper into the outer third of the lower bulbar conjunctiva, allowing it to be impregnated with a tear for 5 minutes. The length of the strip moistened with the tear is removed and the test evaluates the total secretion (basal and reflex). Objective: The cut-off point of the Schirmer I test is between 10 and 15 mm, depending on the authors, therefore we decided to evaluate the concordance between the Schirmer type I tests and the modified 1-minute Schirmer test without anesthesia in university students between 18 and 20 years linked to the Santo Tomás University Bucaramanga section. Materials and methods: A descriptive observational study was conducted with 50 students from the Santo Tomás University Bucaramanga University between the ages of 18 and 20 to which a questionnaire was implemented as a technique to learn about symptoms and lifestyles that could influence the Schirmer test. This concordance study evaluated whether the techniques produce similar results when applied to the same subject and performing the test with time differences (1 and 5 minutes) that guarantee absence of variability and similar conditions. Results: Lin's CCC between the tests was poor. The average values obtained in the 1-minute Schirmer test were for the right eye of 8 mm, for the left eye of 8.5 mm and the average values for the 5-minute schirmer test were for the right eye of 17 mm and for the left eye 20 mm 100% of the population evaluated is a user of electronic devices and the signs that most patients report with 70% are foreign body sensation, red eye and blurred vision. Conclusions: The correlation is poor between the Schirmer tests 1 minute and 5 minutes without anesthesia. Therefore the tests could not be homologated. We recognize the need for more studies with broad inclusion criteria. Keywords: 1 minute schirmer, tear film, concordanceÍtem Análisis de la Relación Entre Espesor Corneal y Cámara Anterior Mediante la Pentacam HR, en Pacientes Atendidos en la Clínica de Optometría de la Universidad Santo Tomás(2020-01-22) Galeano Corzo, Nelly Carolina; Zambrano Buitrago, Angela Marcela; Palencia Flórez, Diana Cristina; Triviño, Julián; Universidad Santo Tomás; https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0001474953; https://scholar.google.com/citations?hl=es&user=tU0OqRUAAAAJ; https://orcid.org/0000-0003-0915-3348At present there are numerous teams that allow to determine the values of thickness, corneal curvature, amplitude, depth and volume of the anterior chamber such as the Pentacam HR; which is a team capable of creating a panoramic image in real time of the previous segment and a topographic-refractive study, yielding true and reliable results due to its high repeatability and reproducibility in the measurements (1-10). The objective of this study was to analyze the relationship between corneal thickness with the anterior chamber using the Pentacam HR, in patients treated at the optometry clinic of the Santo Tomás University from February 2009 to December 2018. The study used was observational, descriptive, transversal court, where 604 examinations thrown by the Pentacam were taken from the years previously mentioned without any intervention to the patient and with the informed consent of the institution. The following parameters were analyzed: age, angle, depth, anterior chamber volume, corneal thickness and topographic shapes. The information was then tabulated and analyzed by means of statistical analysis. The results were: a median age of 31 years, in the volume of 164 mm3, for the angle, depth and thickness was 556 µm. Age and corneal thickness in both women with a total population of 317 and men of 287, it was determined that the older the lower thickness. This study allowed us to conclude that there is an inversely proportional relationship between age and corneal thickness, for the relationship between angle-volume and angle-depth, statistically significant data presented in both female and male groups was evidenced. In the group of men, a greater relationship was demonstrated in terms of thickness-depth as well as thickness-angle than, as found in women, taking into account that the total sample is smaller in the male sex. With respect to topographic forms, the highest prevalence was in women, being the regular form with 56.04% and the lowest frequency was the irregular topographic form with 51.24% in men. Keywords: Corneal thickness, anterior chamber