文档介绍：上海交通大学
硕士学位论文
正常人眼和LASIK术后的角膜Q值及其相关因素分析
姓名:王嘉因
申请学位级别:硕士
专业:眼科
指导教师:柯碧莲
20090501
正常人眼和术后的角膜值及其相关因素分析
摘要
目的:探讨正常人眼的角膜值和准分子激光原位磨镶术( )
后角膜值的变化及其相关因素。
方法:收集年月至年月于上海第一人民医院屈光手
术中心,使用角膜地形图仪检测过的所
有正常眼资料,共例,以及年月至年月于上海第
一人民医院屈光手术中心,进行标准手术并随访的术眼资料,共
例。获得角膜中央范围内,水平径线、垂直径线、鼻侧、颞侧、
上方、下方及角膜总体偏心率值。根据值与值的转换公式:
计算出相应非球面性参数值。并对值与年龄、术前屈光状态、术后
眼压、术后角膜基质床厚度,术中角膜消融厚度,术后角膜瓣厚度等因
素进行相关性分析。
结果: 例正常人眼的角膜值呈现正态分布特征,平均为
±,其中例值为负。岁组相比岁组角膜值显
著增大,而从岁起角膜值有逐渐变小的趋势。角膜鼻侧值小于颞
侧值,上方值小于下方值,反映角膜颞下方区域从中央到周边变
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陡峭趋势比鼻上方明显。术后角膜值由原来的负值明显转变为正值,
水平径线值大于垂直径线值。术后角膜值与术中角膜消融
厚度、术前等效球镜度数及术后角膜瓣厚度呈正相关,与术后眼压、术
后角膜基质床厚度呈负相关。
结论:中均角膜值为±。术后角膜值
由负变正,水平径线值大于垂直径线值,并与术中角膜消融厚度、
术前等效球镜度数及术后角膜瓣厚度呈正相关,与术后眼压和术后角膜
基质床厚度呈负相关。
关键词: 值, ,角膜,非球面性,角膜地形图
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THE CORNEAL Q VALUE AND ITS RELATED FACTORS
IN NORMAL HUMAN EYES AND
MYOPIC EYES AFTER LASIK SURGERY
ABSTRACT
Objective: To observe the corneal Q value and its related factors in
normal human eyes and myopic eyes after LASIK surgery.
Methods: To examine the eccentricity (e) of the corneal asphericity on
2097 eyes which were examined with WAVELIGHT-ALLEGRO
TOPOLYZER from July 2005 to March 2009 and 441 eyes which performed
LASIK surgery from Aug 2005 to Dec 2008 in Refractive Surgery
Department of Shanghai First People’s hospital. Calculate the Q value from
eccentricity (e) with formula:
Q = - | e | e
Analyzed the relationship between Q value with age, refractive state,
intra-ocular tension, thickness of the residual corneal stroma bed, deepness of
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laser ablation, flap thickness after LASIK surgery and so on.
Results: The cornea Q value of 2097 eyes distributes as positive normal
distributing,the average of Q value was - ±. Within 2097 eyes the
cornea Q value of 2091 eyes show negative. Compare with group 13-22y to
group 3-12y, the cornea Q value increased with age. After 23 years old, the
cornea Q value slowly decreased with age.