斜视患者深度运动知觉与静态立体视的关系

目的 研究斜视患者深度运动知觉与静态立体视的关系,分析深度运动知觉获得的影响因素。方法 采用立体视测试软件测量84例斜视患者（间歇性外斜视57例、恒定性外斜视12例、恒定性内斜视15例）与16例正常受试者（对照组）的双眼融合、静态立体视和深度运动知觉。对比分析深度运动知觉和静态立体视检查结果的差异及相关性,分析斜视类型、双眼融合等因素对深度运动知觉获得的影响。结果 斜视组患者存在深度运动知觉和静态立体视者均占59.5%（50/84）,是否存在深度运动知觉与有无静态立体视相关,两种立体视的阈值间存在正相关。对照组所有受试者均显示存在深度运动知觉与静态立体视,两种立体视的平均阈值均低于斜视组,差异有统计学意义（P<0.01）。深度运动知觉检查的通过率于不同斜视类型的患者间存在差异,有87.7%(50/57）的间歇性外斜视患者显示存在深度运动知觉,而所有恒定性斜视患者均未通过深度运动知觉的测量。深度运动知觉的获得与是否存在双眼融合能力相关。结论 斜视患者的深度运动知觉与静态立体视之间存在相关性。斜视患者的深度运动知觉受斜视的类型影响,间歇性外斜视是保留深度运动知觉的主要类型。

Motion-in-depth Perception and Static Stereopsis of Patients with Strabismics

Objective To determine the role of motion-in-depth perception and static stereopsis in strabismics, and factors associated with the perception of motion-in-depth. Methods A total of 84 strabismic patients (including 57 intermittent exotropes, 12 constant exotropes and 15 esotropes) and 16 normal controls were recruited. Binocular fusion ability, static stereopsis and motion-in-depth perception were tested using the computer-generated stereoscopic stimuli. The correlations between these tests were analyzed. Results There was a significant correlation between motion-in-depth perception and static stereopsis in strabismics. Only patients with static stereopsis demonstrated the perception of motion-in-depth. A positive correlation was found between motion-in-depth perception thresholds and static stereopsis in intermittent exotropes. All participants in the control group had motion-in-depth perception and static stereopsis. The participants with stereopsis had significantly lower thresholds than those with strabismus (P<0.01). The perception of motion-in-depth varied with the type of strabismus: 87.7% of the intermittent exotropes exhibited motion-in-depth perception, whereas none of the constant strabismics were able to pass the motion-in-depth perception tests. The perception of motion-in-depth was correlated with the presence of binocular fusion. Conclusions Motion-in-depth perception is correlated with static stereopsis in strabismics. The perception of motion-in-depth varies with the type of strabismus: only intermittent exotropes have the perception of motion-in-depth.