| Comparison of Four Systems of IOL Calculation after Keratorefractive Surgery in Eyes Requiring Cataract Surgery. |
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Woo Seok Lee, Sang Jeong Moon, Kyung Heon Lee, Dong Jun Lee |
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Sungmo Eye Hospital, Busan, Korea. hanwave2@gmail.com |
| 4가지 각막곡률측정 시스템을 이용한 굴절교정수술 후 인공수정체도수계산법 비교 |
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이우석⋅문상정⋅이경헌⋅이동준 |
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Sungmo Eye Hospital, Busan, Korea |
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| Abstract |
PURPOSE
To report the evaluation and comparison of true corneal power after corneal refractive surgery through ARK, Orbscan II(R), Pentacam and IOL master. METHODS: Target IOL (Intraocular lens) power calculated with the SRK/T formula using SMK (Sungmo Eye Hospital keratometry), which is a new method for measuring corneal refractive power, was compared with the back-calculated ideal IOL power after cataract surgery for 30 eyes that required cataract surgery and had previously undergone refractive surgery. Target IOL powers calculated using 4 systems were compared with IOL power calculated using the clinical history method for 64 eyes that had undergone refractive surgery. RESULTS: Using SMK with the SRK/T formula, the actual refraction was within +/-0.5 diopter (D) of the intended refraction for 63.8% of eyes and within +/-1.0 D for 90.9% of eyes. Compared with target IOL power calculated with the clinical history method, target IOL power calculated by SMK with the SRK/T formula had a difference of 1.95 +/- 0.86 D, which was similar to the results calculated by the Haigis-L formula and by TNP with Haigis. CONCLUSIONS: The method of IOL calculation using SMK with the SRK/T formula showed the best predictability in patients after corneal refractive surgery. Comparatively accurate results were produced in IOL power calculations using the Haigis-L formula, and the TNP with Haigis method. |
| Key Words:
Corneal refractive power;IOL power calculation;Refractive surgery |
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