| Accuracy of Three Intraocular Lens-power Formulas in Predicting Refractive Outcomes in Different Intraocular Lenses. |
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Sung Il Kang, Kun Moon, Jong Hwa Jun |
1Department of Ophthalmology, Keimyung University School of Medicine, Daegu, Korea. junjonghwa@gmail.com
2Gang-Nam the Bright Eye Clinic, Seoul, Korea. |
| 일체형과 삼체형 인공수정체 삽입 시 도수 산출 공식 간의 술 후 굴절 예측의 정확성 비교 |
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강승일1⋅문 건2⋅전종화1 |
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계명대학교 의과대학 안과학교실1, 강남더밝은안과2 |
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| Abstract |
PURPOSE
To compare the accuracy of different power-calculation formulas in predicting the postoperative refraction of three-piece and one-piece intraocular lenses (IOL). METHODS: We retrospectively reviewed the medical records of 74 eyes (62 patients) that had undergone cataract surgery involving implantation of one of two IOLs―the SENSAR® AAB00 1-Piece Acrylic IOL (44 eyes), or the Hoya® VA60BB 3-Piece Acrylic IOL (30 eyes)―between October 2014 and March 2015. Axial length was measured using an optical low-coherence refractometry (Lenstar®), and biometry was then calculated by the pre-installed Lenstar program, which used the SRK/II, Sanders-Retzlaff-Kraff/Theoretical (SRK/T), and Hoffer Q formulas. Mean absolute error (MAE) and mean numeric error (MNE) were measured 1 day, 1 week, 1 month, and 2 months after surgery. RESULTS: Using the SRK/T and Hoffer Q formulas, the one-piece IOL group differed significantly from the three-piece IOL group in terms of the MNE obtained 1 month and 2 months after surgery. Across all formulas and time points, there were no significant differences between the groups in terms of MAE. CONCLUSIONS: There was no significant difference between the different power-calculation formulas. Starting 1 month after surgery, the three-piece IOL group showed myopic postoperative refraction compared to the predictive spherical equivalent using the SRK/T and Hoffer Q formulas. |
| Key Words:
Intraocular lenses;Intraocular lens power formula;Mean absolute error;Mean numeric error |
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