摘要
目的分析第三代计算人工晶状体度数的公式SRK—T、Holladay、HofferQ及Haigis公式的计算误差。方法121例白内障患者135只眼，短眼轴组（〈22mm）13只眼、正常眼轴组（22—26mm）75只眼和长眼轴组（〉26mm）47只眼，术前分别用四种第三代计算人工晶状体度数的公式计算人工晶状体度数，植人合适人工晶体，术后3个月验光，减去各公式预测的屈光度数，所得数值的绝对值即各公式的计算误差，比较各公式的计算误差并分析误差来源。结果四种第三代公式在各眼轴组中的计算误差无统计学意义，但各自均是正常眼轴组中的计算精度高，且有统计学意义，并且计算误差与眼轴长度呈直线正相关，而与角膜曲率、人工晶体常数及前房深度无明显相关性。结论第三代计算人工晶状体度数的公式的计算误差随眼轴长度的增加而增加，高度轴性近视会出现远视屈光误差，应适当调整。
Objective To analyze error sources of the third era formulas ofSRK-T, Holladay, Hoffer Q and Haigis in intraocular lens power calculations. Methods A prospective, consecutive, single surgeon clinical trial was conducted on 135 eyes which received routine, standardized phacoemulsification and posteri- or chamber IOL implantation. Patients were divided into three groups by axial length assessed by IOLMaster： short group （〈22mm）, normal group （22mm-26mm） and long group （〉26mm）. The power of IOLs was calculated by formulas of Haigis, Holladay, Hoffer Q and SRK-T. The surgeon chose the proper one to im- plant. Refraction of patients was checked 3 months after surgery. The error between the real refraction error and the predictive ruff＇action error of four formulas was compare. Results In three groups, there was no signifi- cant difference among these formulas. However, the calculation error of individual formula increased as the ax- ial length got longer. Linear correlation between the calculation error of individual formula and the axial length was found. And we got linear regression equations for every formula. Coneluslons The third era formulas get bigger calculation errors in long axial length intraocular lens power calculation. We should amend the power properly before the cataract surgery in patients with long axial length.
出处
《中国实用眼科杂志》
CSCD
北大核心
2009年第12期1350-1352,共3页
Chinese Journal of Practical Ophthalmology
