Regan D, Giaschi D E, Fresco B B
Department of Ophthalmology, Toronto Hospital (Toronto Western Division), Ontario, Canada.
Ophthalmic Physiol Opt. 1993 Apr;13(2):115-23. doi: 10.1111/j.1475-1313.1993.tb00439.x.
The Committee on Ophthalmic Procedures Assessment of the American Academy of Ophthalmology suggested using low-contrast visual acuity measured before and after adding a glare source as a test for assessing overall visual disability from immature cataracts. We have developed a test that follows the Committee's three principles of design, and we report that the effect of glare on visual acuity is considerably greater for recognizing low-contrast letters than for recognizing high-contrast letters. The effect of glare on visual acuity increases progressively as letter contrast is reduced in the stages 96%, 50%, 25%, 11% and 4%. The 25% chart (and possibly the 11% chart) gives the most suitable sensitivity for eyes with immature cataracts. Age-related brunescence and aging itself do not necessarily produce high sensitivity to glare. Sensitivity to glare was markedly different in eyes with different kinds of cataract.
美国眼科学会眼科手术评估委员会建议，在添加眩光光源前后测量低对比度视力，以此作为评估未成熟白内障导致的整体视力残疾的一项测试。我们开发了一项遵循该委员会三项设计原则的测试，并且报告称，眩光对视力的影响在识别低对比度字母时比识别高对比度字母时要大得多。随着字母对比度在96%、50%、25%、11%和4%阶段逐渐降低，眩光对视力的影响会逐渐增加。25%对比度的视力表（可能还有11%对比度的视力表）对患有未成熟白内障的眼睛具有最合适的敏感度。年龄相关性棕黄症以及衰老本身并不一定会导致对眩光高度敏感。不同类型白内障患者的眼睛对眩光的敏感度存在显著差异。
