Journal of Postgraduate Medicine
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Year : 2005  |  Volume : 51  |  Issue : 2  |  Page : 112-115  

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

M Gouthaman, RP Raman, A Kadambi, R Padmajakumari, PG Paul, Tarun Sharma 
 Sankara Nethralaya,18, College Road, Chennai - 600006, Tamil Nadu, India

Correspondence Address:
Tarun Sharma
Sankara Nethralaya,18, College Road, Chennai - 600006, Tamil Nadu
India

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«SQ»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«SQ»s chart. Two-line differences were observed when comparison was made with Standard ETDRS chart and 2 to 3-line differences with Snellen«SQ»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.


How to cite this article:
Gouthaman M, Raman R P, Kadambi A, Padmajakumari R, Paul P G, Sharma T. A customised portable LogMAR chart with adjustable chart illumination for use as a mass screening device in the rural population.J Postgrad Med 2005;51:112-115


How to cite this URL:
Gouthaman M, Raman R P, Kadambi A, Padmajakumari R, Paul P G, Sharma T. A customised portable LogMAR chart with adjustable chart illumination for use as a mass screening device in the rural population. J Postgrad Med [serial online] 2005 [cited 2014 Jul 28 ];51:112-115
Available from: http://www.jpgmonline.com/article.asp?issn=0022-3859;year=2005;volume=51;issue=2;spage=112;epage=115;aulast=Gouthaman;type=0


 
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