白内障超声乳化人工晶体植入术屈光误差分析

Refractive error analysis of phacoemulsification and intraocular lens implantation

目的:分析白内障超声乳化术后屈光误差形成原因,探讨控制误差的有效方法。方法:选择白内障超声乳化人工晶体植入手术,术前预测屈光度与术后屈光度存在0.50 D屈光误差78例,对其进行统计分析,分析屈光误差形成原因。结果:78例(78只眼)屈光误差,其中A超电脑自动测量取值31例,高度近视并发白内障22例,外伤性白内障13例,角膜疾患12例。结论:0.50~2.00 D误差所占比率大,如掌握好角膜屈率,眼轴长度测量技术采用正确的测定方法,此类误差可以避免。A超电脑自动测量取值存在不足之处,应采用自动测量与手工测量相结合取最佳波形,波峰值采样取值,高度近视并发白内障、外伤性白内障采用A、B型超声联合对眼轴长度测定,反复测量,必要时双眼参照取值。角膜疾患也是致屈光误差的原因。

Objective:To analyze the cause of formation of refractive error after cataract phacoemulsification,to explore the effective methods to control the error.Methods:We selected the phacoemulsification and intraocular lens implantation operation to treat the patients.78 cases had refractive error with 0.50 between preoperative evaluation diopter and postoperative refractive diopter.We analyzed the clinical data and the cause of formation of refractive error.Results:78 cases(78 eyes) had refractive error,including the A super computer automatic measurement values of 31 cases,22 cases of high myopia combined with cataract,traumatic cataract in 13 cases,12 cases of corneal disease.Conclusion:The 0.50~2.00 D error ratio is high.If we can grasp the corneal curvature,the correct method of determination of the axial length measurement technology,this kind of error can be avoided.A super computer automatic measurement values exist deficiencies.We should take the best waveform using automatic measurement combined with manual measurement.The wave peak value sampling,high myopia complicated cataract,traumatic cataract should use the A,B type ultrasound to determine the axial length of the eyes,and need to repeated measurements.When necessary,we use binocular reference value.