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本文提出了一种定标激光视网膜功能的新方法。将渐变光栅的暗纹和亮纹等效为具有一定对比度的矩形视标的对象（物）和背景，导出了与Ｅ字形标准视力表视力等效的激光视力的关系式和照度条件，用读数显微镜直接标定激光视力度，其临床研究表明：该二种视标视力测定结果一致性好。
This paper presents a new method of scaling laser retinal function. The obscuration and bright lines of the graded grating are equivalent to the object and the background of the rectangular optotype with a certain contrast. The relation between the visual acuity equivalent to the standard visual acuity of the E-shaped eye and the illuminance conditions are derived. Direct calibration of laser vision, the clinical studies have shown that: the two visual acuity determination of good consistency.