硅油填充术后眼的屈光变化

目的 研究视网膜脱离复位手术硅油填充后各种注视状态下的眼球屈光变化。 方法 采用Gullstrand模型眼参数进行以下分析：（1）非调节状态下正常眼球与硅油填充后眼球的屈光状态；（2）调节状态下正常眼球与硅油填充后眼球的屈光状态；（3）无晶状体眼玻璃体腔填 充后的屈光状态；（4）正常眼球与填充硅油后视网膜像放大率变化；（5）硅油填充后的白内障人工晶状体植入术人工晶状体度数的变化。 结果 （1）与正常眼球屈光相比，硅油填充后，眼球趋向远视，总屈光度变化为+9.19 D；无晶状体眼硅油填充后更趋远视化；（2）硅油填充后如将眼屈光矫正至正视，调节幅度减少1.42 D；（3）硅油填充后常规人工晶状体度数计算公式不再适用，可以通过计算推知合适的晶状体度数。 结论 视网膜脱离复位术并硅油填充后眼球屈光发生了高度远视趋向变化，调节幅度明显下降，常规人工晶状体的有效度数计算在硅油填充后将不再适用。（中华眼底病杂志，2000，16：139-212）

The study on optics and refraction of silicone oil filled eyes

Objective To verify the changes of optics and refraction of the eyes after retinal detachment surgery with the tamponade of silicone oil in vitreous cavity. Methods The optical calculation was taken as the following by using the parameter of Gullstrand model eye:（1）The refraction of silicone filled eye in non-accommodative status;（2）The refraction of silicone filled eye in non-accommodative status;（3）The aniseikonia analysis when one eye filled with the silicone oil;（4）The IOL power re-calculation． Results （1） Compa red with the normal eye,the eye filled with silicone oil is moved toward high hyperopia of +9．19　D;（2）When corrected,the accommodation amplitude reduced 1.42 D induced by filling silicone oil.Conclusion When eye filled with silicone oil,the change of refractive power tends to be highly hyperopic,the amplitude of accommodation decreased,and the regular IOL power calculation formula is no longer available. (Chin J Ocul Fundus Dis，2000，16：139-212)