Abstract
Purpose :
To determine the relative optical performance of two aspheric, hydrophobic acrylic monofocal intraocular lenses (IOLs) with distinct aberration-neutral optical designs using point spread function (PSF) and wavefront flatness as objective measurements of optical quality.
Methods :
Optical metrology of two distinct aberration-neutral, aspheric, hydrophobic acrylic monofocal IOLs (MX60E (Bausch & Lomb), CLRST (Hoya Surgical Optics)) was performed using a wavefront sensor device (SHS Ophthalmic Optocraft GmbH) using an aberration-free, ISO model cornea at set pupil sizes (3mm, 4mm, and 5mm). Point Spread Function (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.
Results :
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 97%, 93%, 70%, respectively for MX60E and 92%,76%, 38%, respectively for CLRST. Wavefront measurements with an aberration neutral ISO model cornea demonstrated a consistent maintenance of a neutral aberration profile across the three apertures tested (MX60E [3mm=0.00, 4mm=0.01, 5mm=0.02] and CLRST [3mm=0.01, 4mm=0.02, 5mm=0.04].
Conclusions :
Based on the observed flatness of wavefront images and higher Strehl ratio data collected, aberration-free performance can attain similar optical outcomes and remain less impacted by pre-existing corneal aberration profile, pupil size dynamics, and extant light levels. The aberration-free designs provide a medium to attain excellent retinal image quality across a broad range of pre-existing corneal aberration profiles and lighting conditions.
This abstract was presented at the 2019 ARVO Annual Meeting, held in Vancouver, Canada, April 28 - May 2, 2019.