Lingam Vijaya
Prevalence and causes of blindness in the rural population of the Chennai Glaucoma Study
Sankara Nethralaya
aim study prevalence causes blindness rural south indian populationmethods 39244800 enumerated 8175 subjects aged 40 years rural tamil nadu underwent comprehensive ophthalmic examinationvisual acuity refraction intraocular pressure gonioscopy cataract grading locs ii retinal examination sita standard indicatedblindness defined using criteria best corrected visual acuity less 360 andor visual field less 10 degrees better eyethe influence age sex literacy occupation assessed using multiple logistic regressionresults 753 subjects 192 321 males 432 females presented visual acuity 360 132 subjects 336 95 ci 280 393 diagnosed blindcataract responsible 7462 eyes glaucoma cystoid macular oedema optic atrophy corneal scars accounted 379 eachbilateral causes blindness cataract 7863 glaucoma 429 optic atrophy 342 cystoid macular oedema corneal scars 256 eachin 19 eyes 72 blindness probably related cataract surgeryblindness positively associated increasing age p00001conclusion 336 studied rural population bilaterally blind cataract single important cause