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Secondary IOL power calculation
Author(s) -
Krag Susanne,
Olsen Thomas
Publication year - 1991
Publication title -
acta ophthalmologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.534
H-Index - 87
eISSN - 1755-3768
pISSN - 1755-375X
DOI - 10.1111/j.1755-3768.1991.tb04850.x
Subject(s) - dioptre , refractive error , ophthalmology , ultrasound , biometrics , optical power , mean value , mathematics , optics , significant difference , mean difference , medicine , optometry , physics , eye disease , statistics , computer science , visual acuity , laser , confidence interval , computer security , radiology
In 40 aphakic eyes undergoing secondary IOL implantation, the axial length was calculated optically as well as measured by ultrasound, and the two methods of axial length determination were compared to evaluate the accuracy in the calculation of secondary IOL power. The mean refractive prediction error (± sd) was 0.18 diopters (± 0.96) and ‐0.37 diopters (± 0.83) using the optical and the biometric method, respectively. The difference in mean value was significant, whereas the variation around the mean value was not found to be significantly different between the two methods. A calculated axial length may offer a valuable alternative to biometry in the aphakic eye, increasing die accuracy of secondary IOL power calculation.