Comparison of the quality of vision using double-pass technique in eyes with corrected refractive errors and emmetropic eyes

Session Details

Session Title: Presented Poster Session: New & Interesting I

Venue: Poster Village: Pod 3

First Author: : M.Henriquez PERU

Co Author(s): :    S. Arba Mosquera   J. Camargo   R. Zuñiga   K. Ruiz-Montenegro   M. Camino   L. Izquierdo Jr        

Abstract Details

Purpose:

To evaluate the quality of vision by measuring objective light scatter index (OSI) and objective optical quality (Strehl ratio and modulation transfer function cutoff frequency [MTF]) in subjects with emmetropia and different types of ametropia.

Setting:

Instituto Oftalmosalud

Methods:

Prospective, cross-sectional study, included 408 eyes between august to September 2018 at Oftalmolsalud Institute de Ojos, Peru. Emmetropic group were eyes with refractive error lower than 0.25 Diopters (D) in the subjective refraction and uncorrected distance visual acuity (UDVA) of 0.0 LogMAR or better; ametropic group were eyes with best spectacle corrected distance VA (CDVA) of 0.0 LogMAR or better and presenting at least a refractive error of 0.25 D or greater. All patients underwent slit lamp examination, VA, refraction and quality of vision assessment with the HD Analyzer (Visiometrics). Statistical analysis was performed with R program using Kruskal-Wallis test.

Results:

106 emmetropic, 32 myopic, 23 hyperopic and 247 astigmatic (89 ≥ 0 [SEQ ≥ 0], and 158 with SEQ < 0 as spherical equivalent) were analyzed. Mean OSI were 0.62 ± 0.63, 0.77 ± 0.70, 0.74 ± 0.30, 0.93 ± 0.55 and 0.85 ± 0.61 and mean MTF were 38.17 ± 10.4, 37.37 ± 10.06, 29.84 ± 9.71, 33.2 ± 12.11 and 33.13 ± 10.09 were in emmetropes, myopia, hyperopia, SEQ ≥ 0 and SEQ < 0 respectively. Significant differences in all variables between emmetropic and corrected hyperopic, SEQ ≥ 0 and SEQ < 0 eyes were found (p<.05).

Conclusions:

In spectacle corrected conditions (with trial frames), emmetropic and simple myopic eyes had significant better quality of vision compared to hyperopic and astigmatic.  This shall be taken into account when comparing postoperative quality of vision between different ametropic groups (regardless of the undergone procedure).

Financial Disclosure:

None