PRK切削中心偏离的临床观察

• 作 者: 赵晓辉 喻长泰 张宁 万金方 李燕 郭珊华
• 机 构: 湖北医科大学附属第一医院眼科
• 出 处: 中国实用眼科杂志
• 发表日期: 1998年04期
• 关键词: 角膜散光 角膜地形图检查 PRK 欠矫 临床观察 瞳孔中心 多光区切削 准分子激光 屈光性角膜 眼球转动

为研究准分子激光屈光性角膜切削术（ＰｈｏｔｏｒｅｆｒａｃｔｉｖｅＫｅｒａｔｅｃｔｏｍｙ，ＰＲＫ）切削中心偏离对角膜散光与欠矫的影响。对ＰＲＫ术后２１０眼行角膜地形图检查后发现，ＰＲＫ切削偏心小于０５０ｍｍ者为３７２％，０５０～１００ｍｍ者为５３３％，１０ｍｍ以上者为９５％，切削偏心平均为０７６ｍｍ，欠矫平均为１４１Ｄ，散光无明显改变。切削偏心能直接导致欠矫的发生，但对角膜散光无明显影响，减小偏心可以避免欠矫的发生。

To study the effect of center deviation on corneal astigmatism and undercorrection in excimer laser photorefractive keratectomy (PRK). Corneal topography examination of 210 eyes after PRK found that the PRK cutting eccentricity was less than 0  50mm were 37  2%, 53  3% 0  50 ~ 1  00 mm, 1  0 mm or more were 9  5%. The average eccentricity of cutting was 076mm, the average value of under-correction was 141D, no significant change of astigmatism. Cutting eccentricity can directly lead to the occurrence of undercorrection, but no significant effect on corneal astigmatism, reducing eccentricity can avoid the occurrence of undercorrection.