Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance
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10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits

 

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Impact of corneal spherical aberration and tear break-up time on contrast sensitivity and visual acuity defocus curves in patients implanted with MIOLs

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Session Details

Session Title: Presented Poster Session: Presbyopia

Session Date/Time: Tuesday 13/09/2016 | 09:30-11:00

Paper Time: 09:50

Venue: Poster Village: Pod 2

First Author: : J.Fernandez SPAIN

Co Author(s): :    M. Rodriguez-Vallejo   J. Martinez   A. Tauste        

Abstract Details

Purpose:

To determine whether corneal Spherical Aberration (SA) or Non-Invasive Break-Up Time (NIKBUT) have influence over the visual performance of patients implanted with Multifocal Intraocular Lenses (MIOLs). To analyze which of these two skills, Visual Acuity (VA) or Contrast Sensitivity (CS), correlates better with the general satisfaction of the patient.

Setting:

Qvision, Ophthalmology Department of Virgen del Mar Hospital (Spain)

Methods:

16 subjects (59 ± 7.5 years) implanted with AT Lisa Tri 839 were enrolled. One of both eyes was selected randomly for measuring VA and CS defocus curves with the Multifocal Lens Analyzer App. Three dependent variables were computed from the average of VA and CS in the following ranges: -3.50 D to -2.50 D (near), -2.00 D to -1.00 D (intermediate) and -0.50 D to +0.50 D (distance). SA was measured using Pentacam for anterior, posterior and both corneal surfaces. NIKBUT was assessed with Keratograph 5M. Four questions about satisfaction and spectacle independence were asked.

Results:

The near, intermediate and distance average was 0.38 ± 0.18, 0.48 ± 0.18, and 0.63± 0.19 log units for CS and 0.16 ± 0.13, 0.11 ± 0.09 and 0.04 ± 0.1 logMAR for VA. Significant correlations were not found between dependent variables and SA or NIKBUT. The average of near and far CSs of the subjects who described their vision quality as “Very Good” were 0.39 and 0.65 log, while the subjects who described it as “Good” was 0.30 and 0.54 log. The average of near and far VAs in subjects who described their vision quality as “Very Good” was 0.17 and 0.05 logMAR, whereas for those who described it as “Good” were 0.15 and 0.05 logMAR.

Conclusions:

According to the results of this study, SA and NIKBUT are not variables of high impact when determining the visual performance achieved with a LIOM. However, these results should be interpreted with caution due to the small sample size. It is necessary to continue researching to reach a representative sample size to confirm or correct these early results. CS defocus curves might be a better indicator than VA defocus curves to predict the general satisfaction of the patient.

Financial Disclosure:

NONE

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