A customised portable LogMAR chart with adjustable chart illumination for use as a mass screening device in the rural population.
J Postgrad Med
;
2005 Apr-Jun; 51(2): 112-4, discussion 115
Article
in English
| IMSEAR
| ID: sea-115435
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 ANDMETHODS:
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.
Full text:
Available
Index:
IMSEAR (South-East Asia)
Main subject:
Rural Population
/
Aged, 80 and over
/
Aged
/
Female
/
Humans
/
Male
/
Vision Screening
/
Reproducibility of Results
/
Rural Health Services
/
Adult
Type of study:
Diagnostic study
/
Screening study
Limits:
Aged80
Country/Region as subject:
Asia
Language:
English
Journal:
J Postgrad Med
Year:
2005
Type:
Article
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