ABSTRACT
Purpose: The aim of this study was to elucidate the type of low vision devices (LVDs) prescribed for patients with cone dystrophy, cone–rod dystrophy, and rod–cone dystrophy and to analyze the visual improvement with the devices. Methods: A retrospective review of 300 electronic medical records of patients with cone dystrophy, cone–rod dystrophy, and rod–cone dystrophy referred to the low vision care (LVC) clinic for the first time between 2014 and 2016 at a tertiary eye care center was done. Collected data included the demographic profile of patients, details of LVDs, and best?corrected vision. Results: Out of 300 patients, 62.6% (n = 188) were male and 37.3% (n = 112) were female. Of the cases, 50% (n = 150) had cone–rod dystrophy, 45% (n = 135) had cone dystrophy, and 5% (n = 15) had rod–cone dystrophy. The most commonly prescribed LVD was SEE?TV binocular telescope (n = 6, 2.0%) for distance and dome magnifier (n = 60, 20%) for near. ET?40 dark grey tint (20.6%) was preferred for managing photophobia. There was a statistically significant difference in both distance and near visual acuities with LVDs (P < 0.05) in all categories, except rod–cone dystrophy. Conclusion: Early diagnosis with appropriate prescription of LVDs including tints helps in achieving good quality of vision in patients with cone?related dystrophies.
ABSTRACT
Retinitis pigmentosa (RP) is an inherited retinal dystrophy leading to progressive loss of vision and blindness. According to some studies the prevalence of RP is reported to be 1/3,000 to 1/5,000. The case presented with sudden painless diminution of vision with watering, slow adjustment from dark to light environments since 2 months. He was an apparently diagnosed case of RP. The treatment was scheduled for 24 weeks of 4 sittings and follow up period of 12 weeks. Outcome was measured based on changes in visual acuity and symptomatic relief. There was improvement in vision from 6/60p and 6/36p to 6/18 vision & 6/18p in right eye and left eye respectively. The progressive nature and lack of a definitive cure needs a cost effective, safe treatment protocol to preserve the existing vision, avoid further progression and restore vision.