Abstract:

Objective To explore the change of binocular disparity information in children with amblyopia. Design Prospective case series. Participants 90 mild, moderate, severe amblyopic children (with 30 cases in each group) with normal eye position. Method The main test method was the computer based visual perceptual test software. Each amblyopic child must take the random dot zero-order disparity, line zero-order disparity, 2nd-order disparity and random dot dynamic 1st-order disparity. Main Outcome Measures The measured value and the pass rate of each disparity. Results In mild, moderate, severe amblyopic children, the proportion of reaching 100＂in random dot zero-order disparity was 43.3%, 16.7%, 0% respectively（χ2=25.550，P=0.000）； the proportion of reaching 100＂in line zero-order disparity was 83.3%,  50.0%, 13.3% respectively （χ2=30.835，P=0.000）； the proportion of passing the 2nd-order disparity was 86.7%, 80.0%, 40.0% respectively （χ2=22.144，P=0.000）and the proportion of passing the random dot dynamic 1st-order disparity in a low speed was 80.0%, 50.0%, 13.3% respectively （χ2=27.379，P=0.000）. Conclusion The binocular disparity information  in the amblyopic children with normal eye position was abnormal. The more severe the degree of amblyopia, the more serious the binocular disparity abnormality.

Key words: amblyopia, binocular disparity