CAJ | 학술논문

目的分析应用Orbscan Ⅱ角膜地形图中央某一区域角膜屈光力,结合Holladay IOL Consultant软件预测准分子激光原位角膜磨镶术(LASIK)后丢失术前资料者人工晶状体(IOL)度数准确性.方法 (1)比较118只LASIK术后眼Orbscan Ⅱ中央4个区域(1.5、2.0、2.5、3.0 mm)角膜屈光力与术后实际角膜屈光力的大小.(2)另选62只LASIK术后眼,取与临床病史法最接近区域角膜屈光力代入Holladay IOL Consultant软件(Holladay Ⅱ、SRK/T、HofferQ 公式)计算IOL度数,然后同临床病史法计算得IOL度数进行比较.结果 (1)LASIK术后Orbscan Ⅱ中央1.5 mm区角膜屈光力小于术后实际角膜屈光力,3.0 mm 区角膜屈光力大于术后实际角膜屈光力,其中2.0及2.5 mm区角膜屈光力与之最为接近,适合用于计算术后IOL度数.(2)采用2.5 mm区角膜屈光力结合Holladay Ⅱ和HofferQ公式计算IOL度数与临床病史法计算IOL度数差值分别为(0.47±0.75)D和(0.52±0.83)D,与临床病史法计算IOL度数差值在±0.5 D之内眼数分别占48.4%和43.5%,差值在±1.0D之内眼数分别占80.6%和74.2%.结论 LASIK术后Orbscan Ⅱ中央2.5 mm区角膜屈光力结合Holladay IOLConsultant软件中的Holladay Ⅱ和HofferQ公式可准确预测丢失术前资料者IOL度数.
목적 분석응용Orbscan Ⅱ각막지형도중앙모일구역각막굴광력,결합Holladay IOL Consultant연건예측준분자격광원위각막마양술(LASIK)후주실술전자료자인공정상체(IOL)도수준학성.방법 (1)비교118지LASIK술후안Orbscan Ⅱ중앙4개구역(1.5、2.0、2.5、3.0 mm)각막굴광력여술후실제각막굴광력적대소.(2)령선62지LASIK술후안,취여림상병사법최접근구역각막굴광력대입Holladay IOL Consultant연건(Holladay Ⅱ、SRK/T、HofferQ 공식)계산IOL도수,연후동림상병사법계산득IOL도수진행비교.결과 (1)LASIK술후Orbscan Ⅱ중앙1.5 mm구각막굴광력소우술후실제각막굴광력,3.0 mm 구각막굴광력대우술후실제각막굴광력,기중2.0급2.5 mm구각막굴광력여지최위접근,괄합용우계산술후IOL도수.(2)채용2.5 mm구각막굴광력결합Holladay Ⅱ화HofferQ공식계산IOL도수여림상병사법계산IOL도수차치분별위(0.47±0.75)D화(0.52±0.83)D,여림상병사법계산IOL도수차치재±0.5 D지내안수분별점48.4%화43.5%,차치재±1.0D지내안수분별점80.6%화74.2%.결론 LASIK술후Orbscan Ⅱ중앙2.5 mm구각막굴광력결합Holladay IOLConsultant연건중적Holladay Ⅱ화HofferQ공식가준학예측주실술전자료자IOL도수.
Objective To evaluate the accuracy of keratometric value derived from one zone of Orbscan Ⅱ mean power map after Laser in situ keratomileusis (LASIK) in combination with Holladay IOL Consultant software to calculate the intraocular lens (IOL) power. Methods A two-part study was conducted at a referral practice. Part 1 was a prospective study of 118 eyes undergoing LASIK. The changes in Orbscan Ⅱ mean power maps at four central zones ( 1.5, 2. 0, 2. 5 and 3.0 mm) were compared with the cornea power calculated from pre-LASIK data to determine the optimum Orbscan Ⅱ correlation zone. In Part 2, the power of optimum measured by Orbscan Ⅱ after LASIK was applied to IOL calculations for 62 eyes undergoing LASIK. And the results were compared with the IOL power calculated by the pre-LASIK data.Results ( 1 ) An analysis at the Orbscan Ⅱ 1.5 mm measurement zone demonstrated an underestimation of net cornea power after LASIK while the 3.0 mm zones demonstrated an overestimation. The 2.0 mm and 2.5mm zones best approximated the net cornea power calculated from pre-LASIK data; (2)The cornea power at 2. 5 mm from Orbscan Ⅱ was selected for IOL calculations in combination with Holladay IOL Consultant software Holladay Ⅱ and HofferQ formula. The refractive error calculated by Holladay Ⅱ and HofferQ formula were (0. 47 ± 0. 75 ) D and (0. 52 ± 0. 83 ) D versus the IOL power calculated by clinical history method. The refractive errors of two formula within ± 0. 50 D were 48.4% and 43.5% and within ± 1.0 D 80. 6% and 74. 2%. Conclusions The cornea power from 2. 5 mm Orbscan Ⅱ zone after LASIK in combination with Holladay Ⅱ or HofferQ formula can accurately predict the IOL power for cataract surgery.