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목적 : To analyze the predictability of diverse intraocular lens (IOL) power calculation formulae in pediatric patients with congenital cataract and to provide a guideline for selection of optimal formula in given clinical situation.
방법 : We retrospectively reviewed the medical record of the pediatric patients who underwent uncomplicated IOL implantation surgery for congenital cataract before 18 years of age. Postoperative refraction was obtained between the period of 4th and 10th postoperative weeks. Only the patients who received IOL implantation in the capsular bag were included. Prediction error (PE) and absolute prediction error (APE) was calculated using SRK II, SRK T and Hoffer Q formulae. The PE and APE calculated from each formula was compared according to age groups: 0-2 year, 3-5 year, 6-10 year, and 11-18 year.
결과 : Among 794 eyes which underwent IOL implantation for congenital cataract, 481 eyes were included in the final analysis. When the distribution of PE was assessed according to the age at IOL insertion and preoperative biometric values, only age at IOL implantation affected the distribution of PE calculated by all of the 3 formulae. For every formulae, the mean PE shows positive value during the first 5 years of age and then converge to zero according to age increases. Both SRK II and SRK T provided the smallest mean APE in 0-2 year group, and SRK II gave the smallest one in 3-5 year group.
결론 : Congenital cataract patients who underwent IOL implantation during the first 5 years of age tend to show relatively large APE. Among the 3 formulae evaluated in our study, SRK II consistently provides the best predictive result in these patients.
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