The aims of this study were to compare acuity estimates achieved with visual evoked potential (VEP) and acuity card techniques and to examine the success rates of each test in a group of multiply handicapped children. Subjects were 52 children (3-183 months) with multiple handicaps associated with prematurity (n = 17), congenital anomalies (n = 16), hypoxic insult (n = 10) and other disorders (n = 9). Success rates for completing the tests were: VEP 88% and acuity cards 85% (Keeler or Cardiff). The acuity card tests were less likely to be successfully completed in the severely disabled (p <0.05) and in those children with nystagmus (p <0.05). When both acuity cards were successful, results agreed to within +/- 1.75 octaves. Acuity card thresholds were significantly correlated with VEP thresholds (p <0.02), but thresholds achieved with VEPs were better in children with poor vision.
|Journal||Eye (London, England)|
|Volume||9 ( Pt|
|Publication status||Published - 1995|
Mackie, R. T., McCulloch, D. L., Saunders, K., Ballantyne, J., Day, R. E., Bradnam, M. S., & Dutton, G. N. (1995). Comparison of visual assessment tests in multiply handicapped children. Eye (London, England), 9 ( Pt, 136-41.