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随着角膜接触镜的应用,有许多问题相应产生。目前对软性角膜接触镜度数的测量还存在一定困难。生产厂家可使用价格昂贵的仪器,但不能普及应用。因此,我们就简易测量软性角膜接触镜屈光度数的方法介绍如下:首先测量配戴者的裸眼视力,然后配戴软性角膜接触镜测出最佳矫正视力,例如配戴者是近视眼时,就使用凸球镜逐渐增加屈光度数,直至配戴者的视力达到裸眼视力为止,记下凸球镜的度数(远视者使用凹球镜)。普通眼镜一般距离角膜顶点12mm,而角膜接触镜紧贴在角膜上,故在眼部实际矫正屈光力不同。其计算方法为F_0=(Fs)/(1-dFs) F_0=软性角膜接触镜屈光度数,Fs=测量后的凸、凹球镜度数(代入公式后改
With the application of contact lenses, many problems have arisen. Currently there are still some difficulties in measuring the degree of soft contact lens. Manufacturers can use expensive instruments, but can not be widely used. Therefore, we briefly measure the soft contact lens refraction method is described as follows: first measure the wearer’s unaided eye vision, and then wear soft contact lenses measured best corrected visual acuity, such as the wearer is myopic , Use the convex spherical mirror to gradually increase the dioptric power until the wearer’s visual acuity reaches the uncorrected visual acuity, record the degree of the convex spherical mirror (presbyopic concave spherical mirror). Ordinary glasses generally 12mm from the corneal apex, and the contact lens clinging to the cornea, so the actual refractive power in the eye is different. The calculation method is F_0 = (Fs) / (1-dFs) F_0 = soft contact lens power, Fs = convex and concave spherical power after measurement (into the formula after the change