Refractive outcomes in cases incorporating intraoperative aberrometry (IA) to determine IOL power

Session Details

Session Title: Cataract Surgery Equipment. Cataract Surgery Outcomes

Session Date/Time: Monday 07/09/2015 | 16:30-18:30

Paper Time: 17:40

Venue: Main Auditorium

First Author: : G.Foster USA

Co Author(s): :                        

Abstract Details

Purpose:

To compare the refractive results in patients who underwent refractive cataract surgery and were implanted with an Alcon Acrysof platform IOLs (SN60WF, SN6AD1, SN6ATx) in which IOL power choice was influenced by IA measurements to the results that would have been obtained had the IOL power determined by preoperative measurements been implanted.

Setting:

A single site ophthalmology center in Fort Collins, CO, USA

Methods:

A retrospective analysis of 220 cataract cases. All subjects had negative ocular health history, other than the diagnosis of cataract. All eyes underwent micro incision cataract surgery with phacoemulsification and implantation of an Alcon Acrysof platform IOL. One month follow-up was obtained. Absolute Value of the Prediction Error (MAVPE) was calculated. The percentages of eyes with absolute errors with ≤ 0.25 D, ≤ 0.50 D, ≤ 0.75 D, and ≤ 1.00 D of predicted postoperative spherical equivalent were tabulated. IA results were compared to the results that would have been obtained with IOL powers determined by pre-op measurements.

Results:

MAVPE for IA was 0.29D ± 0.22, MAVPE for Pre-op calculations was 0.34 ± 0.27. The cumulative distribution at ≤ 0.25D, ≤ 0.50D, ≤ 0.75D, and ≤ 1.00D for IA was 52%, 84%, 95%, and 99% respectively. The distribution for pre-op calculations was 42%, 75%, 93%, and 97% respectively.

Conclusions:

In this group of patients, refractive outcomes as measured by MAVPE and percentage of eyes within 0.50 D of predicted post-op spherical equivalent appear to be improved when IA is incorporated into IOL power determination as compared to outcomes determined by pre-op measurements alone. A larger, randomized, prospective, contralateral eye design study might lead to more definitive results.

Financial Interest:

One of the authors receives consulting fees, retainer, or contract payments from a competing company