Abstract
Design variations in children's distance vision screening charts contribute to inconsistencies noted in preschool vision screening programs. This study compares children's distance visual acuity on two chart designs: logarithm of the minimal angle or resolution (LOGMAR) vs a chart of 'standard' design. In theory, the LOGMAR chart offers the advantages of improved precision in measuring inter-patient differences and greater consistency of follow-up measurements. Our findings indicate the following: 1) the ability to complete a test depends upon the child's age, not on chart design; 2) isolation of symbols is required more frequently for the LOGMAR charts than for the standard charts; and 3) on average, children have slightly poorer visual acuity scores on LOGMAR charts than on standard charts.
Original language | English (US) |
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Pages (from-to) | 189-197 |
Number of pages | 9 |
Journal | Journal of Pediatric Ophthalmology and Strabismus |
Volume | 26 |
Issue number | 4 |
State | Published - Jan 1 1989 |