Posters

Benefit assessment of corneal asphericity modulation for the correction of presbyopia in hyperopic patients: a prospective study over 14 months

Poster Details

First Author: N.Rahmania FRANCE

Co Author(s):    I. Salah-Mabed   R. Rampat   D. Gatinel              

Abstract Details

Purpose:

To compare Distance Visual Acuity (DVA) in Non-Dominant Eye (NDE) achieved with monovision using contact lenses with post-operative bilateral PresbyLasik Custom Q and to confirm laser-induced multifocality in presbyopic and hyperopic patients.

Setting:

Prospective intra-individually controlled superiority study including presbyopic hyperopic patients led between January 2018 and February 2019 Laser Vision Institute Noémie de Rothschild, Paris.

Methods:

Classical monovision was simulated with contact lenses aiming at myopic defocus in NDE whereas an emmetropic correction was targeted in Dominant Eye (DE). We measured visual acuities first with contact lenses then 1, 3 and 6 months post-operatively. We targeted in NDE an aspheric profile by inducing a negative spherical aberration and myopic defocus and in DE a central emmetropia with positive spherical aberration. We measured corneal asphericity (Q-Factor), corneal spherical aberration c(4,0) and c(6,0), in all patients before and after surgery.

Results:

28 patients (mean age: 56,03 ±4,31 years) were included. DVA in Log Mar was statistically different with contact lenses and 6 months after surgery in NDE (0,69± 0,09versus 0,04± 0,18; p<0,00001). Corneal asphericity was equal to 0,66± 0,24 and to -0,12± 0,37; (p< 0,00001), corneal Δc(4,0) to -0,07± 0,15 microns versus 0,01± 0,08 microns; p=0,013, corneal Δc(6,0) to -0,008± 0,02 microns versus -0,004± 0,03 microns; p=0,589 respectively for NDE and DE.

Conclusions:

Our study shows significant improvement in visual scores by changing corneal asphericity with PresbyLasik Custom Q compared to monovision.

Financial Disclosure:

travel has been funded, fully or partially, by a competing company