Urrutia BIP, Lima GV

Language: Spanish
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Page: 43-49
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ABSTRACT

Background. Cataract, a lens opacity that impairs visual function, is the first treatable cause of blindness worldwide. Lens opacity distribution, according to the LOCS III system was identified, in a nosocomial sample from Mexico City, and differences were analyzed according to age and gender. Methods. Observational, cross sectional, retrospective, analytic study; the grade of lens opacity accord ing to the LOCS III system, was identified in eyes that underwent cataract surgery (august 2007 may 2008). Differences were compared by χ² and odds ratio. Results. 278 eyes were evaluated (mean age 61.5 years). 55% of the eyes had nuclear color/opalescence grades 2 5, the higher rate of posterior subcapsular opacity was in grade 5 (38%). No differences were found between genders; the probability of presenting cortical opacity increased above 70 years (OR 3.35), and that of presenting posterior subcapsular opacity increased above 60 (OR 7.51). Discussion. Most of the evaluated eyes had nuclear opacity grades between 2 and 5, which shows that they undergo surgery in the middle of the evaluated rank. Conceming posterior subcapsular opacity, the most common grade was 5, which might be related to the visual impairment it causes. Future studies aimed at the most common grades could have a greater viability.