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一般测定C 值,用眼压描计,或用Schiotz 眼压计加一定法码置于角膜中央,立即记取初压读数RO,每经1分钟连续读取R_1R_2、R_3、R_4,最后在第4分钟读取R_4,测毕将各个R 从Frieaenwald、(1955)表查出相当的压力,P_0～P_4,但也可取其简便(Moses 及Becker)不记中间读数,而只取首尾两读数。因眼压计压在角膜上,角膜便起不同深度凹陷(△>),最初R_0相当P_0比后来P 大,凹陷也最深,即△∨的mm_3数最大。以后因房水的被迫加速外流,便△∨渐渐变小,而变小的趋势,越后越小,即R_4
The general determination of C value, with intraocular pressure, or use the Schiotz tonometer plus a certain code placed in the cornea, and immediately take the initial pressure reading RO, every 1 minute continuous reading R_1R_2, R_3, R_4, and finally in the first 4 Minute reading R_4, measured each R from Frieaenwald, (1955) table to find the equivalent pressure, P_0 ~ P_4, but also can be easy to use (Moses and Becker) do not mind the intermediate readings, and only take the first two readings. Due to tonometer pressure on the cornea, the cornea will have different depths of depression (△>), the initial R_0 P_0 than the later P big, the deepest depression, that △ ∨ mm_3 the largest number. Later, due to forced exacerbation of aqueous humor, △ ∨ gradually become smaller, and smaller trend, the smaller the smaller, that R_4