不同程度弱视儿童双眼视差信息的变化

Change of binocular disparity information in children with amblyopia

目的评估弱视儿童的双眼视差信息改变。设计前瞻性病例系列。研究对象眼位正常的轻度、中度、重度弱视儿童,各30例。方法应用基于计算机平台的视感知觉检查方法对弱视儿童的双眼视差信息进行量化检测。分别测定随机点0阶视差、线条0阶视差、2阶视差、随机点动态1阶视差。主要指标视差测量值或通过百分比。结果轻度、中度、重度弱视儿童随机点0阶视差达100"的比例分别为43.3%、16.7%、0%(χ2=25.550,P=0.000);线条0阶视差达100"的比例分别为83.3%、50.0%、13.3%(χ2=30.835,P=0.000),2阶视差正确率达100"的比例分别为86.7%、80.0%、40.0%(χ2=22.144,P=0.000),随机点动态1阶视差低速通过者的比例分别为80.0%、50.0%、13.3%(χ2=27.379,P=0.000)。结论眼位正位的弱视儿童其双眼视差信息均存在异常,弱视程度越深,异常越严重。(眼科,2015,26:377-380)

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-or- der disparity, line zero-order disparity, 2nd-order disparity and random dot dynamic lst-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 （X2=25.550,P=0.000）; the proportion of reaching 100in line zero-order disparity was 83.3%, 50.0%, 13.3% respectively （X2=30.835,P=0.000）; the proportion of passing the 2nd-order dis- parity was 86.7%, 80.0%, 40.0% respectively （X2=22.144,P=0.000）and the proportion of passing the random dot dynamic lst-order dis- parity in a low speed was 80.0%, 50.0%, 13.3% respectively （X2=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.