急性和已缓解视神经炎的对比敏感度测量
Contrast sensitivity measurements in acute and resolved optic neuritis.
作者信息
Beck R W, Ruchman M C, Savino P J, Schatz N J
出版信息
Br J Ophthalmol. 1984 Oct;68(10):756-9. doi: 10.1136/bjo.68.10.756.
Abstract
We measured contrast sensitivity by means of Arden grating plates in 41 eyes with acute optic neuritis and in 51 eyes with resolved optic neuritis. The scores were abnormal in 93% of eyes in the acute phase and 78% in the resolved phase irrespective of visual acuity. Even when acuity improved to 6/7.5 or better with resolution of the neuritis, 67% of eyes still showed abnormal contrast sensitivity. Since Snellen acuity represents just one point at the high spatial frequency end of the contrast sensitivity function, a patient in whom acuity improves to 6/6 with resolution of optic neuritis may still have difficulty seeing objects of lower relative contrast or at lower spatial frequencies.
摘要
我们使用阿登光栅板对41只急性视神经炎患眼和51只已愈视神经炎患眼进行了对比敏感度测量。无论视力如何，急性期93%的患眼和恢复期78%的患眼得分异常。即使在神经炎消退后视力提高到6/7.5或更好，仍有67%的患眼对比敏感度异常。由于斯内伦视力仅代表对比敏感度函数高空间频率端的一个点，因此视神经炎消退后视力提高到6/6的患者在观察相对对比度较低或空间频率较低的物体时可能仍有困难。
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