巩膜环扎加压术后屈光度的改变

Refractive changes in the eye after scleral encircling and buckling surgery

摘要:

目的:探讨视网膜脱离巩膜环扎加压术后眼部屈光状态的改变。方法:用眼科A超、检影验光等对23例23眼原发性视网膜脱离患者手术前1d及术后1,4,12wk时的眼轴长度、眼屈光度等进行测量并将结果进行比较。结果:眼轴长度、晶状体厚度增加在术后1,4,12wk时均较术前增长(P<0.01)。眼屈光度增加、前房深度变浅,及角膜曲率增加在术后1,4,12wk时均较术前增加,且向负值偏移(P<0.05)。结论:巩膜环扎加压术后眼轴长度和屈光状态的变化与眼内嵴有关,术后眼轴增长是眼屈光度负值增加的主要因素。

Abstract:

AIM:To investigate changes in refractive state after scleral encircling and buckling surgery·METHODS:Twenty-three cases(23 eyes) that were successfully treated for rhegmatogenous retinal detachment with scleral encircling and buckling were measured with A-scan ultrasonography and given rtinoscopy optometry 1 day before surgery,as well as 1 week,4 weeks and 12 weeks after surgery.Refractive factors,axial length,chamber depth,lens thickness,refractive power of cornea and diopter status of the eyes were measured and compared pre-and post-operatively·RESULTS:When compared to the data obtained before surgery,significant increases in both axial length and lens thickness of the eyes were observed on the 1st,4th and 12th week after surgery(P<0.01 for both factors,but P<0.05 for diopter strength and anterior chamber shallowing refractive power increase.Diopter strength had a tendency to shift to a negative value·CONCLUSION:Axial length and diopter strength increased after surgery.This suggests that the myopic shift after scleral encircling and buckling surgery may be primarily caused by the increase of axial length.