散光儿童的弱视：缺陷模式
Amblyopia in astigmatic children: patterns of deficits.
作者信息
Harvey Erin M, Dobson Velma, Miller Joseph M, Clifford-Donaldson Candice E
机构信息
Department of Ophthalmology and Vision Science, The University of Arizona, 655 N. Alvernon Way, Suite 108, Tucson, AZ 85711-1824, USA.
出版信息
Vision Res. 2007 Feb;47(3):315-26. doi: 10.1016/j.visres.2006.11.008. Epub 2006 Dec 20.
Neural changes that result from disruption of normal visual experience during development are termed amblyopia. To characterize visual deficits specific to astigmatism-related amblyopia, we compared best-corrected visual performance in 330 astigmatic and 475 non-astigmatic kindergarten through 6th grade children. Astigmatism was associated with deficits in letter, grating and vernier acuity, high and middle spatial frequency contrast sensitivity, and stereoacuity. Although grating acuity, vernier acuity, and contrast sensitivity were reduced across stimulus orientation, astigmats demonstrated orientation-dependent deficits (meridional amblyopia) only for grating acuity. Astigmatic children are at risk for deficits across a range of visual functions.
在发育过程中因正常视觉体验中断而导致的神经变化被称为弱视。为了表征与散光相关的弱视所特有的视觉缺陷，我们比较了330名散光儿童和475名非散光儿童（从幼儿园到六年级）的最佳矫正视力表现。散光与字母、光栅和游标视力、高中空间频率对比敏感度以及立体视锐度的缺陷有关。尽管光栅视力、游标视力和对比敏感度在不同刺激方向上均有所降低，但散光患者仅在光栅视力方面表现出方向依赖性缺陷（子午线弱视）。散光儿童在一系列视觉功能方面都有出现缺陷的风险。
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