Nippon Ganka Gakkai zasshi · 2002
[Intraocular lens power calculation and refractive change in pediatric cases].
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Kora Yukiko, Kinohira Yayoi, Inatomi Makoto, Sekiya Yoshibumi, Yamamoto Misao, Majima Yoshinao
Аннотация
PURPOSE: To evaluate the intraocular power calculation formula for children and the change of the refraction.
SUBJECT AND METHODS: We reviewed the medical records of 66 pediatric cases with intraocular lens (IOL) implantation after cataract extraction and results of questionnaire of the Japanese Association of Pediatric Ophthalmology and Japanese Society of Cataract and Refractive Surgery. We employed four IOL power calculation formulae(SRK, SRK II, SRK/T, Holladay) to evaluate the accuracy of preoperative prediction of refraction.
RESULTS: The best preoperative prediction was obtained by the SRK formula; the predictive refraction error within +/- 1 D was shown in 65% of patients. SRK/T and Holladay formulas were less accurate in patients aged 5 years old or younger. All formulae were less accurate in patients with axial length of 22 mm or shorter. There was no significant difference in the mean change in refraction over four years among three different age group (group 1: < = 5, group 2: 6 << = 10, group 3: 11 << = 15(years old(YO)). However, several patients aged 10(YO) or younger showed severe myopic changes during this period.
CONCLUSION: The IOL power calculation fomulae show less accuracy on pediatric cases. It is also difficult to predict the change of refraction on pediatric cases.
SUBJECT AND METHODS: We reviewed the medical records of 66 pediatric cases with intraocular lens (IOL) implantation after cataract extraction and results of questionnaire of the Japanese Association of Pediatric Ophthalmology and Japanese Society of Cataract and Refractive Surgery. We employed four IOL power calculation formulae(SRK, SRK II, SRK/T, Holladay) to evaluate the accuracy of preoperative prediction of refraction.
RESULTS: The best preoperative prediction was obtained by the SRK formula; the predictive refraction error within +/- 1 D was shown in 65% of patients. SRK/T and Holladay formulas were less accurate in patients aged 5 years old or younger. All formulae were less accurate in patients with axial length of 22 mm or shorter. There was no significant difference in the mean change in refraction over four years among three different age group (group 1: < = 5, group 2: 6 << = 10, group 3: 11 << = 15(years old(YO)). However, several patients aged 10(YO) or younger showed severe myopic changes during this period.
CONCLUSION: The IOL power calculation fomulae show less accuracy on pediatric cases. It is also difficult to predict the change of refraction on pediatric cases.