Abstract:
AIM:The aim was to construct a visual acuity chart and find its effectiveness at screening visual acuity deficits. MATERIALS AND METHODS:Two phases were involved in this study.Construction of the screener: Ten Sloan letters (C, D, H, K, N, O, R, S, V, and Z) were selected and the letters were constructed and reduced to 0.2 logMAR acuity size (6.92 mm) for viewing at 3 m. The screener contains three lines with seven letters in each. Few combinations of the seven letter sequences were chosen based on the row legibility scores. Three seven letter combinations close to the median of all combinations were selected, such that maximum difficulty score difference between the lines are <1%. Finding the effectiveness of the screener: 100 literate subjects with unaided visual acuity better than or equal to 6/60 were recruited for the study. Unaided visual acuity was tested using both the newly constructed Pocket Vision Screener and a logMAR visual acuity chart and the time taken to measure the visual acuity using both the charts was noted. RESULTS:The mean age of the subjects was 43 ± 17 years. Subjects were classified as normal or deficient based on the logMAR visual acuity measurement. The screener was found to have 81% sensitivity, 94% specificity. The positive and negative predictive values were found to be 91% and 87%, respectively. A significant difference (P < 0.001) was found in the time taken to record visual acuity using both the charts. CONCLUSION:The Pocket Vision Screener can be used as a quick and accurate tool to screen subjects for visual acuity deficits, being highly sensitive, specific, and cost-effective.
journal_name
Indian J Ophthalmoljournal_title
Indian journal of ophthalmologyauthors
Raja M,Ramamurthy D,Srinivasan K,Varadharajan LSdoi
10.4103/0301-4738.149137subject
Has Abstractpub_date
2014-12-01 00:00:00pages
1152-5issue
12eissn
0301-4738issn
1998-3689pii
IndianJOphthalmol_2014_62_12_1152_149137journal_volume
62pub_type
杂志文章abstract:CONTEXT:Intracameral mydriatic solution can eliminate the disadvantages of repeated eye drop instillation regimen and provide adequate mydriasis for phacoemulsification with added advantages. AIMS:Evaluating the role of intracameral irrigating solution (0.5% lignocaine + 0.001% epinephrine) in initiating and maintaini...
journal_title:Indian journal of ophthalmology
pub_type: 杂志文章,多中心研究
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abstract:Purpose:The aim of this study was to present the outcomes of the 2018 and 2020 Vitreo-retinal Society of India (VRSI) biosimilars of anti-vascular endothelial growth factor (VEGF) (VIBE) surveys. Methods:An online survey of members of VRSI was conducted in July 2018 and January 2020 regarding their practice-patterns o...
journal_title:Indian journal of ophthalmology
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journal_title:Indian journal of ophthalmology
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journal_title:Indian journal of ophthalmology
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journal_title:Indian journal of ophthalmology
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