Dr.Parikshit Gogate, G06928
The visual acuity measurements were recorded using Lea, HOTV and E charts. Frisby, Titmus and Randot preschool stereo tests were used for stereo acuity measurements. All the children underwent dry refraction, squint assessment, anterior segment examination, cycloplegic refraction and retinal evaluation. The presenting visual acuity <20/40 or 0.3 log Mar in the study eye was considered to be a visual impaired eye. 254 eyes were analyzed. Mean age was 63.4±12.5 months. Sensitivity, specificity, PPV and NPV of Lea chart were 88.1%, 96.9%, 96.5% and 89.2% and HOTV chart were 87.3%, 97.7%, 97.3% and 88.1% for screening visual impairment. 66.7%, 63.6%, 60% and 70% was observed for Frisby stereo test. Titmus stereo fly test exhibited 88.5%, 40.0%, 54.1% and 81.2% while Randot preschool stereo test displayed 74.1%, 56.1%, 58% and 72.5% respectively. There was very good correlation between the visual acuity charts (ICC =0.990), but poor correlation between stereo acuity charts (ICC = 0.198).
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