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IOL power calculation for myopic patients

Poster Details

First Author: Z.Gyenizse HUNGARY

Co Author(s):    E. Szathm   S. Vajda   G. Vogt        

Abstract Details


To evaluate IOL power calculation for high grade myopic patients (axial length > 26 mm) attended our Department for cataract surgery.


Department of Ophthalmology, Military Hospital, Budapest, Hungary


Data of 50 eyes of 37 patients have been analyzed. Power of implantable IOLs has been calculated by IOL Master (Carl Zeiss) before surgery. Changes in refraction, BCVA, IOP as well as the axial length, anterior chamber depth, and power of implanted IOL have been examined. Results achieved have been compared to the planned correction calculated by using various IOL power calculation formulas. Follow-up period was 3 months.


Mean age was 68 years (between 49 and 86 years), two-third of patients being female. Preoperative mean refractive error was -11.14±5.46 D. Expectations of patients were taken into consideration and low grade myopic corrections were planned. Accordingly, the postoperative mean refractive error was -2.65±1.66 D. Mean axial length, mean anterior chamber depth, and mean power of implanted IOL were 28.29±2.01 mm, 3.42±0.33 mm and 11,0 D (between -1,0 and 9,0), respectively. At the end of the follow-up period mean difference between the planned and achieved diopters calculated by using either SRK-T, Haigis, Hoffer Q or Holladay formulas were 0.58±0.44 D, 0.68±0.54 D, 0.8±0.63 D and 0.78±0.62 D, respectively. Accuracy of IOL power calculation deteriorated at higher axial lengths.


IOL power calculation using IOL Master (Carl Zeiss) is an easy-to-perform procedure also in case of myopic patients. Third and fourth generation IOL power calculation formulas are recommended to achive accurate postoperative refraction. FINANCIAL DISCLOSURE?: No

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