Ambrósio Renato, Klyce Stephen D, Wilson Steven E
Department of Ophthalmology, University of Washington, Seattle, WA 98195, USA.
J Refract Surg. 2003 Jan-Feb;19(1):24-9. doi: 10.3928/1081-597X-20030101-05.
To review the incidence of corneal abnormalities detected in the preoperative examination, using videokeratography and pachymetry that excluded patients from laser in situ keratomileusis (LASIK) or photorefractive keratectomy (PRK).
We conducted a chart review of consecutive patients who had a preoperative examination and were excluded from refractive surgery.
Eighteen patients from 1,392 refractive candidates (1.3%) were designated as poor candidates for LASIK or PRK based on corneal topography and/or pachymetry. Thirteen patients (0.9%) were identified as having keratoconus suspect, keratoconus, or pellucid marginal degeneration. Five patients (0.4%) were excluded due to thin corneas (<490 microm) despite normal corneal topography.
Corneal topography and pachymetry are indispensable tools in the preoperative screening of refractive surgery candidates.
回顾术前检查中通过角膜地形图和角膜厚度测量法检测到的角膜异常的发生率，这些检查将患者排除在准分子原位角膜磨镶术（LASIK）或准分子激光屈光性角膜切削术（PRK）之外。
我们对连续进行术前检查并被排除在屈光手术之外的患者进行了病历回顾。
在1392名屈光手术候选者中，有18名患者（1.3%）基于角膜地形图和/或角膜厚度测量法被认定为不适合进行LASIK或PRK手术。13名患者（0.9%）被确定患有圆锥角膜可疑、圆锥角膜或透明边缘变性。5名患者（0.4%）尽管角膜地形图正常，但因角膜薄（<490微米）而被排除。
角膜地形图和角膜厚度测量法是屈光手术候选者术前筛查中不可或缺的工具。
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