弱视眼视力矫正正常后的对比敏感度分析

Contrast sensitivity in successfully treated amblyopes

目的分析弱视患者经治疗后视力≥5.0的弱视眼的对比敏感度。方法对34例(34眼)经过治疗后弱视眼视力≥5.0者和40例(40眼)年龄相匹配的正常眼对比敏感度进行测量。测量采用RM-800对比敏感度仪,对两组眼进行不同空间频率[1.8、3、6、12,18和24周/度(cycles/degree,c/d)]对比敏感度的测量。结果弱视组的对比敏感度在各个空间频率均较正常组差(P<0.01),尤其在中、高空间频率下降更明显。结论视力矫治后的弱视眼对比敏感度仍存在异常,对比敏感度可以作为评价弱视治疗视觉功能提高的方法之一。

Objective To investigate contrast sensitivity in successfully treated amblyopes （visual acuity ≥5.0）. Methods Contrast sensitivity was tested on 34 eyes of 34 amblyopic patients who had beert successfully treated （visual acuity ≥5.0）. Forty notarial subjects （40 eyes） were used as age-matched controls. Contrast sensitivity was assessed with an RM-800 contrast testing instrument, testing for six spatial frequencies of 1.8, 3, 6, 12, 18 and 24 cycles per degree （cpd）. Results The contrast sensitivity of the ＂cured＂ amblyopic eyes of the 34 amblyopic patients had significantly decreased （P〈0.01） at all frequencies compared to the control subjects, especially in the middle and high frequencies. Conclusion Successfully treated amblyopes have abnormal contrast sensitivity. Contrast sensitivity can be regarded as one parameter for assessing visual function after treatment in amblyopes.