视力表是主要的视力检查工具,自1862年snellen 视力表问世以来,学者们对视力表的视标增率、形状及照度等做了大量的研究改进,使其日臻完善,但由于它检测的仅是高明度对比的中心视力,因此,造成了原发性青光眼等疾病早期视力不受影响的假象。晚近的研究表明,这类疾病的早期,其色觉和对比敏感度已明显受累,鉴此,我们利用彩色的色彩特性和低明度对比特性,研制了彩色对比视力表,并进行了初步的临床验证,现报道如下: Eye chart is the main visual inspection tool, since the snellen sight came 1862, scholars have made a lot of research improvements to visual acuity chart standard rate, shape and illumination, so that it is improving, but because of its detection It is only the central vision of a high degree of contrast, thus creating the illusion that early glaucoma and other diseases are not affected by early visual acuity. Recent studies have shown that early in this type of disease, the color vision and contrast sensitivity have been significantly affected, therefore, we use the color characteristics of low contrast and low contrast developed color contrast chart, and conducted a preliminary clinical validation , Are reported as follows: