Optical Power Profiles Of A Monofocal Standard Aspheric Intraocular Lens And An Enhanced Monofocal One For Three Nominal Powers.
Published 2022 - 40th Congress of the ESCRS
Reference: PP19.01 | Type: ESCRS 2022 - Posters | DOI: 10.82333/vz6k-d938
Authors: Nuria Garzón 1 , María García-Montero* 1 , Jose Antonio Gómez-Pedrero 2 , Verónica González-Fernández 2 , César Albarrán-Diego 3
1Optics and Optometry,Complutense University,Madrid,Spain, 2Optics,Complutense University,Madrid,Spain, 3Optics, Optometry and Vision Science,Valencia University,Valencia,Spain
Purpose
To evaluate the power profiles, the spherical aberration and the aberrometric profile of a monofocal standard aspheric intraocular lens (RayOne RAO600C Aspheric, Rayner Surgical, UK) and an enhanced monofocal based on positive spherical aberration (RayOne EMV RAO200E, Rayner Surgical, UK).
Setting
Complutense University. Optics and Optometry Faculty. Madrid. Spain.
Methods
The lenses were measured in powers +10.00D, +20.00 and +30.00D using an optical system based on a quantitative deflectometry technique that measures light deviations through a combination of the Schlieren principle with a phase-shifting method (NIMO TR1504 (Lambda-X, Belgium)). All lenses were measured in a balanced salt solution at different aperture diameters. The lenses are manufactured with the same material and the same platform. The optical lens power distribution as a function of the aperture radius was described in terms of radial computed colour maps, radial averaged power profiles, spherical aberration, and aberrometric profiles for difference distances from center.
Results
When the power profiles were analyzed, the monofocal standard lenses showed the same nominal power from the center to the periphery, but the enhanced monofocal revealed a change toward more positive power values from the center to the periphery of the lens. The refractive power of the enhanced monofocal lenses did not reach the value of the nominal distance power (+10.00, +20.00 and +30.00D) until a radial distance of between 0,3 and 0,4 mm from the center of the lens.
The addition obtained with the enhanced monofocal lenses depended on the nominal power. The higher the nominal IOL power, the higher the addition provided by the lenses. The addition obtained for the three IOL powers was 0.8D, 1.0D and 1.6D for a radial distance of 2.00mm.
Conclusions
The relation between the pupil diameter, the corneal aberration of the patients and the power profile of these intraocular lenses have a crucial implication on the final distance and intermediate visual acuity that could be achieved by patients. The higher additions were achieved with the higher nominal IOL powers.