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Alice T Epitropoulos, Andrew Pilon, Valeri Kolesnitchenko; Point spread function and wavefront evaluation of IOLs with different amount of spherical aberration. Invest. Ophthalmol. Vis. Sci. 2018;59(9):257.
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© ARVO (1962-2015); The Authors (2016-present)
To determine the relative optical performance of various hydrophobic acrylic monofocal intraocular lenses (IOLs) with different amounts of spherical aberration (SA) using point spread function (PSF) and wavefront flatness as objective measurements of optical quality.
Optical metrology of three unique monofocal hydrophobic acrylic IOLs ( enVista MX60E, Acrysof IQ and Tecnis ZCB00) was performed using a waverfront sensor device ( SHS Ophthalmic Optocraft GmbH) using an aberration-free, ISO model cornea at set pupil sizes (3mm, 4mm, and 5mm). PSF images with Strehl ratios along with resultant wavefront patterns, peak to valley (PV) and root mean square (RMS) values were collected. All measurements were collected in accordance with the ISO 11979-2 guidance document.
PSF data and corresponding Strehl ratios of the incident light transferred to the retinal plane via an aberration free model cornea through a 3mm, 4mm and 5mm aperture were as follows: enVista (97%, 93%, and 70%), Acrysof IQ (85%, 20% and 6%) and Tecnis (87%, 16% and 4%). Wavefront measurements with an aberration neutral ISO model cornea demonstrated a consistent, low PV and RMS values across the three apertures tested for enVista [3mm (PV = 0.12, RMS = 0.02), 4mm (PV =0.29, RMS = 0.04), 5mm(PV = 1.12, RMS = 0.12)] as compared to Acrysof IQ [3mm (PV = 0.41, RMS = 0.07), 4mm (PV =1.16, RMS = 0.49), 5mm(PV =2.62, RMS = 0.49)]and Tecnis [3mm (PV = 0.52, RMS = 0.04), 4mm (PV =1.65, RMS = 0.34), 5mm(PV = 2.16, RMS = 0.99)]monofocal platforms.
Based on the observed flatness of wavefront images, sharp PSF images and higher Strehl ratio data collected, the aberration free enVista IOL performance is less impacted by pre-existing corneal aberration profile, pupil size dynamics and extant light levels. enVista’s design allows it to provide superior retinal images compared to Acrysof IQ and Tecnis monofocal aspheric platforms over a broad range of corneal aberrations and lighting conditions.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.
PSF Of Various IOL Designs Through Neutral Aberration Cornea
Wavefront Analysis Of Various IOLs Through Different Sized Apertures
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