亚临床期与进展期圆锥角膜地形图的比较

Comparison of corneal topography between subclinical keratoconus and progressive keratoconus

目的探讨圆锥角膜患者角膜地形图的特点,以期早期发现圆锥角膜患者。方法5例(8只眼)亚临床期圆锥角膜患者,14例(20只眼)进展期圆锥角膜患者。检查项目:(1)角膜地形图形态,(2)角膜中央层屈光力,(3)角膜屈光度的变化范围,(4)角膜曲率,(5)角膜表面规则指数。结果亚临床期的患者中,角膜地形图主要表现为蝶形,且多为非对称性,进展期的患者主要表现为乳头形、卵圆形及球形,角膜中央屈光度,距角膜中央I-S值有差异。结论角膜地形图检查可以早期发现圆锥角膜。

Objective To investigate the characteritics of keratoconus under corneal topography, especially the early Keratoeonus. Methods 19cases of Keratoconus were examined by corneal topography, in which 5 cases were in subclinical stage 14 eases （ 20 eyes ） progressive. The topography morphology, central corneal refractive, power,keralometry, corneal astigmatism, the surface regularity index （ SRI ）. Results The corneal topography of subclinical keratoeonus showed bow-tie pattern ,and most of them is asymmetric pattern. In progressive keratoconus, central area form a cone , the shape was round, oval and papilla-like central corneal refractive power, the I-S value were different. Conclusion Corneal topography may be a useful method to early diagnosis of keratoconus.