[放射状角膜切开术后角膜稳定性的生物力学研究]
[Biomechanical study of corneal stability after radial keratotomy].
作者信息
Kohlhaas M, Böhm A, Lerche R C, Hjortdal J O, Ehlers N, Draeger J
机构信息
Universitäts-Augenklinik Hamburg Eppendorf.
出版信息
Klin Monbl Augenheilkd. 1996 May;208(5):285-7. doi: 10.1055/s-2008-1035216.
BACKGROUND
Radial Keratotomy is one of the most frequent refractive surgical procedures performed worldwide. It results in considerable alterations of the corneal structure. What does this mean for the mechanical properties of the cornea?
METHODS
Intraocular pressure was increased via a 180 degrees tilt. Before and during this procedure, corneal topography was measured by photokeratoscopy. We examined 36 patients after RK and 25 controls who had not undergone any surgical procedure.
RESULTS
The corneal center flattened by 0.523 +/- 0.054 dpt (p < 0.01) in the RK patients and by 0.187 +/- 0.045 dpt (p < 0.05) in the control group.
CONCLUSION
Even several years after radial keratotomy, corneal stability is still decreased.
背景
放射状角膜切开术是全球范围内最常见的屈光手术之一。它会导致角膜结构发生显著改变。这对角膜的力学性能意味着什么？
方法
通过180度倾斜增加眼内压。在此过程之前和期间，通过光角膜镜测量角膜地形图。我们检查了36例接受放射状角膜切开术的患者和25例未接受任何手术的对照组。
结果
放射状角膜切开术患者的角膜中心变平0.523±0.054屈光度（p<0.01），对照组为0.187±0.045屈光度（p<0.05）。
结论
即使在放射状角膜切开术后数年，角膜稳定性仍会降低。
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