Ocular aberrometry with pyramidal wavefront sensor in eyes implanted with extreme power monofocal spherical intraocular lenses

Session Details

Session Title: Quality of Vision and Dry Eye

Session Date/Time: Sunday 08/10/2017 | 08:00-09:30

Paper Time: 08:36

Venue: Room 3.4

First Author: : R.Ferreira-Oliveira SPAIN

Co Author(s): :    J. Alio   L. Salerno   A. Plaza Puche              

Abstract Details

Purpose:

To evaluate the ocular aberrometry profile induced by extreme powered monofocal spherical intraocular lenses (IOLs) using a novel pyramidal wavefront sensor aberrometer

Setting:

VISSUM Alicante, Spain.

Methods:

Prospective comparative observational study including 88 eyes of 56 patients with ages ranging between 40 to 83 years who underwent uneventful small incision cataract surgery with implantation of monofocal spherical IOL. Patients were divided into three groups according to the IOL dioptric power (D): (1) +20-23D; (2) <+10D; and (3) ≥+29D. Assessments after 3 or more months after surgery included uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), refraction, slit lamp biomicroscopy, contrast sensitivity test (Ginsburg), corneal aberrometry (KR-1W, Topcon) and total ocular aberrometry at 4-, 4.5- and 5-mm pupil diameters with a pyramidal wavefront sensor (Osiris, CSO).

Results:

Ocular aberrometry with the pyramidal wavefront sensor showed significant difference between groups in terms of primary spherical aberration [Z(4,0)] with 4.5- and 5.0-mm pupils, lower in group 2 (p=.015 and p<.01, respectively), and vertical trefoil [Z(3,-3)] with 4.5- and 5.0-mm pupils, also lower in group 2 (p<.01). We found no significant difference in spherical aberration between groups 1 and 3 at any analyzed pupil diameter. There was no significant statistical difference between the 3 groups postoperatively in terms of refractive error, contrast sensitivity, corneal aberrometry values or total ocular HOA at any analyzed pupil diameter.

Conclusions:

Lowered powered IOLs (<+10 D) induce significantly lower spherical aberration and vertical trefoil at 4.5- and 5.0-mm pupils, while higher powered spherical IOLs (>29) show a trend towards higher levels of spherical aberration compared to normal range IOLs (+20-23 D), although this difference is not statistically significant for up to 5.0-mm pupil diameters. Extreme powered monofocal spherical IOLs, especially with high positive values, should be made according to a customized shape (bending factor) and design which results in optimal levels of spherical aberration, thus improving optical and visual outcomes of cataract surgery in highly ametropic eyes.

Financial Disclosure:

NONE