Accommodative and vergence responses to conflicting blur and disparity stimuli during development.
Accommodative and vergence responses to conflicting blur and disparity stimuli during development.
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DOI：
10.1167/9.11.4
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发表时间：
2009-10-05
影响因子：
1.8
通讯作者：
Candy TR
中科院分区：
文献类型：
--
作者：
Bharadwaj SR;Candy TR
典型发育中的视觉系统的辨别和聚散响应是使用包括视网膜模糊和视差的线索的组合来生成的。模糊和视差线索在产生这些运动反应的发展重要性进行了评估，将两个线索相互冲突。在140名受试者（2.0个月至40.8岁）的双眼前放置−2 D镜片或2 MA底外棱镜，同时在80 cm处观看卡通电影，诱导线索冲突。晶状体调节和棱镜聚散的频率和幅度随年龄增加（均p < 0.001），在所有年龄段，聚散反应（平均值± 1 SEM = 1.38 ± 0.05 MA）略大于屈光反应（1.18 ± 0.04 D）（p = 0.007）。这些反应的幅度随着冲突刺激（1至3 D或MA）的增加而降低（均p < 0.01）。对-2D透镜的耦合聚散度响应（0.31 ± 0.06 MA）和对2 MA基底向外棱镜的耦合反射响应（0.21 ± 0.02 D）显著小于（均为p < 0.001），与开环聚散度（r = 0.12; p = 0.44）和开环调节（r =-0.08; p = 0.69）的相关性较差。典型的发展中的视觉系统补偿模糊和视差刺激之间的短暂引起的冲突，而不表现出强烈的偏好，无论是线索。这种补偿的准确性随着线索冲突幅度的增加而降低。
Accommodative and vergence responses of the typically developing visual system are generated using a combination of cues, including retinal blur and disparity. The developmental importance of blur and disparity cues in generating these motor responses was assessed by placing the two cues in conflict with each other. Cue-conflicts were induced by placing either −2 D lenses or 2 MA base-out prisms before both eyes of 140 subjects (2.0 months to 40.8 years) while they watched a cartoon movie binocularly at 80 cm. The frequency and amplitude of accommodation to lenses and vergence to prisms increased with age (both p < 0.001), with the vergence response (mean ± 1 SEM = 1.38 ± 0.05 MA) being slightly larger than the accommodative response (1.18 ± 0.04 D) at all ages (p = 0.007). The amplitude of these responses decreased with an increase in conflict stimuli (1 to 3 D or MA) (both p < 0.01). The coupled vergence response to −2 D lenses (0.31 ± 0.06 MA) and coupled accommodative response to 2 MA base-out prisms (0.21 ± 0.02 D) were significantly smaller than (both p < 0.001) and poorly correlated with the open-loop vergence (r = 0.12; p = 0.44) and open-loop accommodation (r = −0.08; p = 0.69), respectively. The typically developing visual system compensates for transiently induced conflicts between blur and disparity stimuli, without exhibiting a strong preference for either cue. The accuracy of this compensation decreases with an increase in amplitude of cue-conflict.
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