体外研究眼压变化对角膜双折射的影响。
The in vitro study of pressure change effect on corneal birefringence.
机构信息
The Peking University Third Hospital, Peking University Eye Center, Beijing, China.
出版信息
Ophthalmic Res. 2010;43(3):159-68. doi: 10.1159/000272028. Epub 2009 Dec 31.
PURPOSE
To study the change of corneal birefringence at different pressures in vitro to determine whether corneal birefringence changes along with pressure.
METHODS
The pattern of corneal birefringence was recorded at different intraocular pressures. The pressure differences were 0.10, 0.50 and 1.00 mm Hg, respectively. To compare the pattern sequence at two pressure values, a nonpaired t test was performed.
RESULTS
Statistical analysis indicates that the difference of the corneal birefringence is significant when the pressure difference was more than 0.50 mm Hg in polarized light.
CONCLUSION
The results of corneal photoelasticity in vitro demonstrate that the change in pressure on the cornea leads to a change in corneal birefringence.
目的
研究体外不同压力下角膜双折射的变化，以确定角膜双折射是否随压力而变化。
方法
记录不同眼内压下角膜双折射的模式。压力差分别为 0.10、0.50 和 1.00 毫米汞柱。为了比较两个压力值的模式顺序，进行了非配对 t 检验。
结果
统计分析表明，在偏振光下，当压力差大于 0.50 毫米汞柱时，角膜双折射的差异具有统计学意义。
结论
体外角膜光弹测量结果表明，角膜上压力的变化导致角膜双折射的变化。
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