Adamsons I, Rubin G S, Vitale S, Taylor H R, Stark W J
Dana Center for International Ophthalmology, Johns Hopkins Medical Institutes, Baltimore, Md.
Arch Ophthalmol. 1992 Aug;110(8):1081-6. doi: 10.1001/archopht.1992.01080200061025.
To establish the effect of cataracts on glare and contrast sensitivity, we graded type and amount of lens opacity in 110 subjects who underwent two glare tests (Brightness Acuity Tester and Berkeley glare test) and two contrast sensitivity tests (a sine-wave test and Pelli-Robson chart). Twenty-seven subjects (25%) had clear lenses (mean visual acuity of 20/20) and 83 subjects (75%) had early lens opacities (mean visual acuity of 20/40) in otherwise normal eyes. Multiple regression techniques were used to control for the effects of age and visual acuity. Glare test scores were significantly lower for nearly all patients with lens opacities than for patients with clear lenses and were the lowest for patients with lenses with posterior subcapsular opacity. Contrast sensitivity scores were lower for all patients with lens opacities than for patients with clear lenses at high frequencies only; all lens opacity groups scores similarly with each other. These results indicate reduced visual function among patients with cataracts whose visual acuity is only minimally impaired.
为确定白内障对眩光和对比敏感度的影响，我们对110名接受两项眩光测试（亮度视力测试仪和伯克利眩光测试）以及两项对比敏感度测试（正弦波测试和佩利-罗布森图表）的受试者的晶状体混浊类型和程度进行了分级。27名受试者（25%）晶状体清晰（平均视力为20/20），83名受试者（75%）在其他方面正常的眼睛中存在早期晶状体混浊（平均视力为20/40）。采用多元回归技术来控制年龄和视力的影响。几乎所有晶状体混浊患者的眩光测试分数均显著低于晶状体清晰的患者，且晶状体后囊下混浊患者的分数最低。仅在高频时，所有晶状体混浊患者的对比敏感度分数低于晶状体清晰的患者；所有晶状体混浊组的分数彼此相似。这些结果表明，视力仅轻微受损的白内障患者视觉功能下降。
