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目的:分析探讨单眼散光弱视患儿对比敏感度(CS)视功能的受损特点。方法:对正常儿童组36例、单眼散光弱视组34例、单眼非散光弱视组33例,共103例,用静态F.A.C.T图表和计算机Gabor斑CS检查程序分别检查患儿对侧眼、弱视眼及90°和180°两主子午线方向上的对比敏感度。结果:①单眼散光弱视组和单眼非散光弱视组的对侧眼、弱视眼的CS值在所有空间频率均较正常组的CS降低(P<0.05),表现为中、高空间频率区CS的明显受损(P<0.01)。②单眼散光弱视组的弱视眼在90°和180°两主子午线方向上的对比敏感度有显著差异(P<0.01)。结论:弱视儿童的对侧眼不正常。用计算机Gabor斑检查可以了解弱视散光儿童不同子午线上的CS存在的差异,明确定位弱子午线,并可以针对子午线性弱视,进一步开展知觉学习的治疗。
Objective: To investigate the impairment of contrast sensitivity (CS) visual function in children with monocular astigmatism. Methods: Totally 36 cases of normal children, 34 eyes of monocular astigmatism and amblyopia, 33 eyes of monocular non-astigmatism and amblyopia were enrolled. A total of 103 cases were examined with static FACT chart and computer Gabor spot CS procedure. 90 ° and 180 ° two main meridian contrast sensitivity. Results: (1) Compared with normal subjects, CS values of contralateral and amblyopic eyes in both amblyopic and monocular non-astigmatism group were lower than those in normal group (P <0.05), showing CS in the middle and high spatial frequency regions Significantly impaired (P <0.01). (2) The contrast sensitivity of amblyopic eyes in monocular astigmatism and amblyopic eyes was significantly different between the two principal meridians of 90 ° and 180 ° (P <0.01). Conclusion: Contralateral eyes of amblyopia children are not normal. Computer Gabor patch examination can be used to understand the difference of CS in different myopic astigmatism children with amblyopic astigmatism, to locate the weak meridian and to further develop the learning of sensory learning for amblyopia.