Hoffer Q와 SRK/T 인공수정체 도수 계산 공식의 이론적 임상적 비교

• 영문명: Theoretical and Clinical Comparison of the Hoffer Q and SRK/T Formulas
• 발행기관: 대한안과학회
• 저자명: 정진호 김성곤 이혜진 이선호 차동민,Jin Ho Jeong, MD, PhD, Sung Gon Kim, MD, Hye Jin Lee, MD, Sun Ho Lee, MD, Dong Min Cha, MD
• 간행물 정보: 『대한안과학회지』Ophthalmological Society,volume55,number1, 85~92쪽, 전체 8쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 2014.01.15

영문 초록

Purpose: To evaluate the biometric conditions causing increased disparity in the calculation of intraocular lens (IOL) power between the Hoffer Q and SRK/T formulas. Methods: A prospective comparative study was conducted on 365 uneventful, cataract surgeries performed at a tertiary care center by one surgeon. The IOL power was calculated using both the Hoffer Q and SRK/T formulas with A-scan biometry. For a selected IOL power, the expected disparity between the 2 formulas (EDF) was measured and the EDF value was used to categorize the cases. The resultant error associated with each formula was determined at postoperative 6 weeks. KAL was defined as the product of mean corneal power (K) and axial length (AL). Postoperative errors of both formulas were calculated and their association with preoperative biometry measurements analyzed. Results: In 17.8% of the cases, the EDF was larger than 0.4 D, possibly leading to different IOL diopter recommendations. The EDF value and the product of corneal curvature and axial length were significantly correlated (R2 = 0.855, p ＜ 0.001). Multiple regression analysis of causative preoperative biometric factors on the postoperative formula errors showed that astigmatism, anterior chamber depth (ACD), and lens thickness (LT) were significantly associated with Hoffer Q error and SRK/T error. Conclusions: Overall, both formulas performed very well when recommending the correct IOL power. The cause of disparity between the predicted refraction for the 2 formulas was more associated with KAL than K or AL alone. Astigmatism, ACD, and LT were the causative factors for the postoperative errors in both formulas. J Korean Ophthalmol Soc 2014;55(1):85-92

키워드

Effective lens position, Hoffer Q formula, IOL formula comparison, SRK/T formula