摘要
目的 比较SRK -Ⅱ和SRK -T公式 ,以提高高度近视白内障人工晶状体屈光度计算的准确性。方法 使用相同的生物参数和A常数 ,比较SRK -Ⅱ和SRK -T公式理论计算值的差异。对 2 3例 (2 6眼 )高度近视白内障行晶状体超声乳化吸出联合人工晶状体植入术 ,用SRK -T公式计算人工晶状体屈光度 ,记录SRK -T和SRK -Ⅱ两公式在实际植入人工晶状体屈光度下对应的预计术后屈光度 ,并比较两公式的预测偏差 ,评估测量的准确性。结果 按照SRK -T公式计算结果植入人工晶状体术后 ,按照两公式计算预计屈光度为SRK -Ⅱ(1.3 7± 0 .45 )D ,SRK -T(-0 43± 0 .15 )D。预计偏差有显著性差异。结论 SRK -T公式适用于眼轴长度 >2 7.0mm的高度近视白内障 ,其准确性明显优于SRK -Ⅱ公式。
Objective To compare the accuracy of two IOL power formulas (SRK-T and SRK- II) in order to improve the accuracy of predicative IOL powers for patients with cataract and high myopia. Methods With identical biological parameter and A-con stant, the differences in predicative refraction between SRK-Ⅱ and SRK-T were compared, 23 patients 26 eyes)with cataract and high myopia underwent phacoemulsification and posterior chamber IOL implantation were studied, IO L power were calculated in SRK-T, actual IOL power and corresponding predictive IOL power after IOL implantation were recorded with SRK-T and SRK-Ⅱ formulas; the predictive error between two formula were campared to evaluate accuracy of measurement. Result predicative postoperative spherical equivalent is (1.37 ±0.45)D with SRK-Ⅱ, and (-0.43±0.15)D with SRK-T; The difference between these two formulas was statistically significant. Conclusion SRK-T formula is appropriate for high myopia eyes with axial length longer than 27.0 mm. In this group, SPK-T formula is much more accurate than SPK- II formula.
出处
《眼外伤职业眼病杂志》
北大核心
2005年第1期11-13,共3页
Journal of Injuries and Occupational Diseases of the Eye with Ophthalmic Surgeries
