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眼屈光状态的测定,临床上普遍采用且较准确的是视网膜检影法。但散瞳检影时,患者有暂时畏光及视近不清等缺点,待瞳孔复原后还需复验,比较麻烦。现介绍一种简单易行,特别适用于40岁以上散光患者的扇块散光表法。 一、扇块散光表构成: 1.一个扇形的线条表,线条间隔10°;2.两
The determination of refractive status of eyes, clinically commonly used and more accurate retinoscopy. However, when the mydriasis retinoscopy, the patient has temporary photophobia and visual shortcoming, etc., to be re-examination of the pupil to be reconsidered, more trouble. Now introduced a simple and easy, especially for patients over the age of 40 astigmatism in patients with block astigmatism. First, a piece of astigmatism table composed of: 1. A fan-shaped line table, the line spacing of 10 °; 2. Two