Calculation of IOL Optical Power in Patients after Undergoing Radial Keratotomy in Real Clinical Practice

Barkhatova E.P., Santoro E.Yu., Parokhonko Yu.S.

The purpose of the study — to evaluate the long–term results of calculating IOL in patients with an anterior radial keratotomy in the anamnesis. Introduction. In recent years, there has been an increase in the number of cataract patients who had previously undergone radial keratotomy. There is no single IOL calculation tactic for this group of patients. The risk of not getting into the target refraction after surgery remains very high. Patients and methods. The results of calculating the optical strength of IOL in 13 patients (16 eyes) with a history of radial keratotomy in the period from January 2021 to April 2023 were analyzed. The calculation of IOL was carried out using the formulas Hoffer-Q, HAIGIS, Barret TrueK with keratometry data Tomey OA 2000 and Verion. Based on the obtained values, the optical power of the IOL was determined by selecting a results close in value within the limits of the diopter, preference was given to IOL with greater optical strength. Results. In the long–term period (6 months — 2 years) uncorrected visual acuity averaged 0.56 ±0.06, visual acuity with correction - 0.69±0.06. The refractive index of the eye averaged -0.45±0.2 dptr. Conclusions. The calculation of the optical power of the IOL using the formulas Hoffer-Q, HAIGIS, Barret TrueK gives high functional results without applying corrections.

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