机构地区:[1]卫生部北京医院眼科,100730 [2]香港养和医院眼科
出 处:《中华眼科杂志》2008年第10期899-901,共3页Chinese Journal of Ophthalmology
摘 要:目的验证准分子激光原位角膜磨镶(LASIK)术后人工晶状体度数的有效测量方法。方法回顾性系列病例研究。收集在香港养和医院行LASIK手术8年或3个月后因白内障形成而行白内障超声乳化吸除术的患者28例(40只眼)。利用临床既往数据计算得出K(K1)值以及由IOLmaster人工晶状体测量仪所测得K(K2)值,将K值输入SRK/T公式得出人工晶状体的度数。用K1与用K2预测术后屈光度组问比较采用配对t检验,用K1预测术后屈光度与术后3个月时实际屈光度组间比较采用秩和检验。结果患者眼轴长度为(24.28—31.96)mm,平均为(28.06±1.98)mm。LASIK手术前的初始屈光度数(球镜当量)为(-3.13~-18.00)D,平均为(-10.44±3.93)D;K值为(41.40~46.90)D,平均为(43.57±1.47)D。最佳矫正视力:19只眼为1.0,10只眼为0.8,7只眼为0.6,4只眼为0.5。LASIK术后6个月的平均屈光度数(球镜当量)为(-2.83~+1.25)D,平均为(-0.32±0.95)D。超声乳化白内障吸除术前的平均屈光度数(球镜当量)为(-5.75~+1.13)D,平均为(-2.35±2.16)D。根据临床既往数据计算所得的K1平均值(KpreLASIK+RpreLASIK—RpostLASIK)为(27.60-40.70)D,平均为(34.62±3.56)D,由IOLmaster人工晶状体测量仪所测得的K2值为(32.39~43.53)D,平均为(38.04±2.45)D,两者间比较差异有统计学意义(t=-7.68,P=0.00)。由K1值测得的人工晶状体度数的术后预计平均屈光度数(球镜当量)为(-3.69~0.61)D,平均为(-1.32±1.00)D;而由K2值测得的则为(-3.67~3.95)D,平均为(-0.60±1.84)D,两者差异有统计学意义(t=-2.40,P:0.02)。超声乳化自内障吸除术后的平均屈光度数(3个月以上)为(-4.50~+1.75)D,平均(-1.10±1.51)D,与K1值测得的人工Objectives To investigate the effective method for the calculation of intraocular lens power retrospectively from post-LASIK cases. Methods It was a retrospective case series. 40 eyes of 28 patients (14 male and 14 Female) had the Phacoemulcification post-LASIK in HongKong Sanitorium & Hospital; the age ranged from 41.00 to 69.00 years ages, (50. 68 ± 6. 56) years. LASIK was done from January, 1997 to April ,2005. Phacoemulcification was done from October, 2000 to September,2005. Results Average axial length was (28.06 ± 1.98) mm (rang from 24.28 to 31.96 mm). The initial refraction power ( Spherical Equivalent, SE) before EASIK was from - 3. 13 to - 18.00 D, ( - 10. 44 ± 3.93 ) D. K value pre-LASIK was 41.40 to 46. 90 D, ( 43.57 ± 1.47 ) D. The best corrected visual acuity (BCVA) preLASIK was 20/20 in 19 eyes, 20/25 in 10 eyes,20/30 in 7 eyes and 20/40 in 4 eyes. The refraction power of 6 months post-LASIK(SE)was -2. 83 to + 1.25 D, ( -0. 32 ±0. 95) D . The refraction power pre-phaco (SE)was - 5.75 to + 1.13 D, ( - 2. 35 ± 2. 16 ) D. The calculated K1 ( KpreLASIK - RpostLASIK + RpreLASIK) was 27.60 to 40. 70 D, ( 34. 62 ± 3.56 ) D. The K from the IOLmaster ( K2 ) was 32. 39 to 43.53 D, (38.04± 2. 45 ) D. The target refraction of K1 was - 3.69 to O. 61 D, ( - 1.32 ± 1.00 ) 13, the target refraction of K2 was - 3.67 - 3.95 D, ( - 0. 60 ± 1.84) D. There was significant difference between these two target refraction, ( t = - 2.40, P = 0. 02 ). The refraction power of post-phaeo ( 〉 3 months) was - 4. 50 to + 1.75 D, ( - 1.10 ± 1.51 ) D. The BCVA post-Phaco was 20/20 in 20 eyes, 20/25 in 9 eyes, 20/30 in 5 eyes and 20/40 in 6 eyes. Conclusions The formula used in the study for the calculation of intraoeular lens power is accurate and effective.
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