Интрастромальная фемтокератопластика с имплантацией роговичных сегментов в коррекции аберраций высшего порядка у пациентов с кератоконусом

Abstract

Aim. To evaluate the potential of femtosecond laser assisted intrastromal keratoplasty (FLAIK) with implantation of corneal ring segments in the correction of higher order aberrations in patients with stage I–II keratoconus. Material and methods. 15 patients (14 men and 1 woman) were examined and treated surgically, in total of 17 eyes, with stage I and II keratoconus (according to the classification of Izmailova S.B., 2014). All patients underwent FLAIK with implantation of corneal ring segments. Results. The change in the estimated parameters at an average follow-up period of 4.7 months showed that after FLAIK with implantation of corneal ring segments, best corrected visual acuity increased statistically significantly (p < 0.05) in all cases and increased by an average of 0.29 ± 0.09. In addition, there was a statistically significant (p < 0.05) decrease in the total level of higher order aberrations by 1.5 times (by 0.69 ± 0.4 D), a decrease in the level of coma aberration by 1.7 times (by 0.74 ± 0.4 D), a decrease in the level of spherical aberration by 1.6 times (by 0.07 ± 0.12 D). Conclusions. FLAIK with implantation of corneal ring segments is an effective method for correcting higher-order aberrations in patients with keratoconus of stage I–II. FLAIK with keratoconus with implantation of corneal ring segments makes it possible to achieve a significant increase in BCVA in patients with stage I–II keratoconus. Key words: keratoconus, higher order aberrations, corneal segments, refractive surgery