Liberty by Medicontur, a Complex in Structure, Hydrophilic Intraocular Lens in the Correction of Eyes with Preoperative Myopia

Research Article

Austin J Clin Ophthalmol. 2024; 11(1): 1173.

Liberty® by Medicontur, a Complex in Structure, Hydrophilic Intraocular Lens in the Correction of Eyes with Preoperative Myopia

Adam Cywinski*; Paulina Bazgier

Silesian Eye Treatment Centre, Poland

*Corresponding author: Adam Cywinski Silesian Eye Treatment Centre, Okrezna 11, 44-240 Zory, Poland. Tel: 0048502137635 Email: adamcyw@gmail.com

Received: November 29, 2023 Accepted: January 02, 2024 Published: January 09, 2024

Abstract

A retrospective analysis of visual function in patients with preoperatively diagnosed myopia, after implantation of Liberty® intraocular lens, including the influence of some factors like a kind of surgery, values of angle alpha and kappa, pupil size, values of higher order aberrations generated by the lens on visual acuity to far and near distances was done. Lens removal and Liberty® implantation was done 47 eyes, including in 13 patients in both eyes. In 7 eyes, it was a toric lens. A mean preoperative value of myopia was -6.72 Dsph. Cataract removal accounted for 55% of all procedures performed, the rest being Refractive Lens Exchange. Preoperative pupil size was between 3.6 and 6,4 mm. The average postoperative visual acuity to far distances was 0.13 (logMar), and to near distances was 0.51 (Snellen). Rare cases of insufficient quality of vision to intermediate distances, when the postoperative pupil size was greater than 4 mm, resolved after increasing light intensity in the room. A bigger values of higher order aberrations corresponded with lower values of preoperative visual acuity to far distances. A bigger values of angle alpha corresponded with lower values of postoperative visual acuity to far distances, which were significantly higher in cataract group. Visual acuity to far distances was also better in eye with bigger pupil size. A specific structure of the lens allows patients to see good to the near distances, even if the light intensity not perfect.

Keywords: Angle kappa; Angle alfa; Cataract; Diffractive lens; EDOF; Higher order aberrations; Myopia; Refractive lens exchange

Abbreviations: EDOF: Extended Depth of Focus; VA: Visual Acuity; HOA: Higher Order Aberrations; RLE: Refractive Lens Exchange; LVC: Laser Vision Correction; UBVA: Uncorrected Best Visual Acuity; BCVA: Best Corrected Visual Acuity; LRI: Limbal Relaxing Incision

Introduction

Liberty® intraocular lens is a product made by Medicontur Company. Its complex structure combines the features of a diffractive, trifocal lens with the EDOF structure (Figure 1a,b).