AIM: To observe pattern visual evoked potential(P-VEP)of varying degrees hyperopic refractive amblyopic children.

METHODS: We did P-VEP examination for the hyperopic refractive children from May 2011 to August 2012. We divided these children into three groups according to different best corrected vision(BCV): better than 0.5 amblyopic group, 0.3-0.5 amblyopic group and lower than 0.3 amblyopic group. Their P₁₀₀ latency and amplitude were measured and compared with normal children group.

RESULTS: The healthy eye's P₁₀₀ latency was 101.43±6.82ms, P₁₀₀ amplitude was 11.27±5.38μV. P₁₀₀ latency delay and P₁₀₀ amplitude decline in amblyopic group. Better than 0.5 amblyopic group, 110.54±8.47ms, 9.94±5.28μV; 0.3-0.5 amblyopic group 118.76±6.21ms, 8.57±7.21μV; and lower than 0.3 amblyopic group 124.54±7.36ms, 7.49±5.07μV. P₁₀₀ latency and amplitude have significant different between groups(P<0.05).

CONCLUSION: P₁₀₀ latency delay and P₁₀₀ amplitude decline in hyperopic refractive amblyopia and the changes are associated with degree of amblyopia.