Comparación entre sistemas de estabilización de prisma de balastro y estabilización acelerada de lentes de contacto blandos tóricos: reporte de casos

Abstract

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.