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.
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Mackie, R., McCulloch, D., Saunders, K. et al. Comparison of visual assessment tests in multiply handicapped children. Eye 9, 136–141 (1995). https://doi.org/10.1038/eye.1995.23
- Acuity cards
- Multiple handicap
- Visual acuity
- Visual evoked potentials
Documenta Ophthalmologica (1997)
Documenta Ophthalmologica (1995)