角膜散光晶体散光与总合散光关系的研究  

The Relations of Corneal, Lenticular and Total Astigmatism

作　　者：梁丹[1] 关征实[1] 林健民[1] 

机构地区：[1]中山医科大学中山眼科中心,广州510060

出　　处：《眼科学报》1995年第2期70-72,共3页Eye Science

摘　　要：目的:探讨角膜散光、晶体散光及总会散光三者之间的关系;了解三者随年龄的变化规律。方法:门诊屈光不正患者,散瞳检影验光及Topcon角膜曲率计检查。结果:共194例382眼;角膜散光67.9％循规性,晶体散光68.1％反规性,总合散光60.7％循规性;88.5％角膜散光与总合散光相同性质,46％的眼总合散光为角膜与晶体散光之和,41.3％的眼为角膜散光循规性,晶体散光反规性,发挥中和与抵消部分膜散光的作用。随年龄增加,循规性角膜、晶体、总合散光减少,反规性散光增加;角膜垂直径屈光力与年龄负相关,水平径屈光力与年龄正相关。结论:角膜形态决定总合散光;晶体对总合散光的影响是多方面的;角膜屈光力的变化尤其水平径屈光力的增加以及晶体循规性散光的减少是随年龄增加出现反规性总合散光的原因。眼科学报 1995;11:7O—72。Purpose: To determine the relations of corneal, lenticular and total astigmatism and the changes of the astigmatism with age.Method: Out-patients with refractive errors were refracted with retinoscope after using cycloplegic drops and measured the radii of anterior corneal curvature. Result: One hundred and ninety-four cases (382 eyes) with refractive errors were studied. Of the eyes 67.9% had regular corneal astigmatism, 68. 1% irregular lenticular astigmatism and 60. 7% regular total astigmatism. 88. 5% of the corneal astigmatism has the same quality as the total astigmatism. The total astigmatism in 46% of the eyes included the summation of corneal and lenticular astigmatism, but in 41. 3% of the eyes irregular lenticular astigmatism corrected the regular corneal astigmatism. The astigmatism of cornea, lens and total astigmatism changed from regular to irregular with the increase of age. The linear correlation analysis showed a positive correlation between the power of horizontal corneal refracti nd age, and a negative corrlation between the power of verti cal corneal refraction and age.Conclusion: The shape of cornea was the major cause of total astigmatism. The influence of lens on the total astigmatism was different. The reasons for the change of the total astigmatism from regular to irregular with the increase, of age were the changes of the power of the corneal refraction, particularly the increase of the power of horizontal corneal refraction and lenticular irregular astigmatism. Eye Science 1995; 11: 70- 72.

关 键 词：角膜 晶体 散光 屈光不正 

分 类 号：R778.13[医药卫生—眼科]