a customised portable logmar chart with adjustable chart illumination for use as a mass screening device in the rural population

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ID: 149126
2005
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Abstract
Aim: To develop a customised, portable, cost-effective (logarithmic minimal angle resolution) LogMAR chart with adjustable illumination for use as a mass vision-screening device in the rural population. Materials and Methods : Visual acuity of 100 individuals was evaluated with a customised chart and compared with the standard Early Treatment Diabetic Retinopathy Study (ETDRS) chart and Snellen′s Chart. Bland and Altman analytical techniques were used for analysis. Results: Test-retest variability of the customised chart was just a one-line difference (95% CI for agreement), and so were the results with the standard ETDRS charts; a variability of 3-line was noted with Snellen′s chart. Two-line differences were observed when comparison was made with Standard ETDRS chart and 2 to 3-line differences with Snellen′s chart. Conclusion: The customised portable LogMAR chart with adjustable illumination shows less test-retest variability and better agreement with standard ETDRS chart; therefore, it can be used as a mass vision-screening device in rural settings.
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Authors ;Gouthaman M;Raman R;Kadambi A;Padmajakumari R;Paul P;Sharma Tarun
Journal international islamic university malaysia engineering journal
Year 2005
DOI
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URL
http://www.jpgmonline.com/article.asp?issn=0022-3859;year=2005;volume=51;issue=2;spage=112;epage=115;aulast=Gouthaman
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