Posters

Analysis of light distortion for pseudophakic patients with monofocal, refractive multifocal, and diffractive multifocal posterior chamber intraocular lenses

Poster Details

First Author: M.Balgos SPAIN

Co Author(s):    I. Cabezos   A. Plaza-Puche   M. Canto   P. Yebana   J. Alio del Barrio   J. Alio     

Abstract Details

Purpose:

This study aims to analyze the distortion produced by a point of light in pseudophakic patients, and to compare values noted between monofocal, refractive multifocal and diffractive multifocal posterior chamber intraocular lenses.

Setting:

Vissum Instituto Oftalmologico, Alicante, Spain

Methods:

This is a prospective study, with 30 patients (30 eyes) included. Subjects were divided into 3 groups of 10 eyes each according to the posterior chamber intraocular lens implanted: monofocal, refractive multifocal, and diffractive multifocal. Best-corrected distance (CDVA) and near (CNVA) visual acuity, and uncorrected distance (UNVA) and near (UNVA) visual acuity, were measured. Light distortion was quantified with a validated instrument, the Light Distortion Analyzer® (CEORLab, University of Minho, Portugal). The parameters noted included distortion index, distortion area, Best Fit Circle Radius (BFCr), and Best Fit Circle Irregularity (BFCI). Descriptive analysis was performed on all data.

Results:

For monofocal lenses, the distortion index was 18.94 ± 8.34%, and the distortion area 3194 ± 1829 mm2; the BFCr was 34.92 ± 7.30 mm, and BFCI was 0.41 ± 0.23 mm. For diffractive multifocal lenses, the distortion index was 29.09 ± 14.05%, the distortion area 5849 ± 2847 mm2; the BFCr was 43.19 ± 9.63 mm, and BFCI was 0.45 ± 0.21 mm. For refractive multifocal lenses, the distortion index was 18.97 ± 6.10%, the distortion area 3816 ± 1227 mm2; the BFCr was 35.12 ± 5.90 mm, and BFCI was 0.62 ± 0.33 mm.

Conclusions:

Diffractive multifocal lenses cause more distortion of light than refractive multifocal lenses, which in turn cause more distortion of light than monofocal lenses.

Financial Disclosure:

None