Copenhagen 2016 Registration Programme Exhibitor Information Virtual Exhibition Satellite Meetings Glaucoma Day 2016 Hotel Star Alliance

10 - 14 Sept. 2016, Bella Center, Copenhagen, Denmark

This Meeting has been awarded 27 CME credits


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Comparison of simulated keratometric changes following wavefront-guided and wavefront-optimized myopic photorefractive keratectomy

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Session Details

Session Title: Presented Poster Session: Keratorefractive Surgery Outcomes: Myopia

Session Date/Time: Saturday 10/09/2016 | 15:00-16:30

Paper Time: 15:50

Venue: Poster Village: Pod 2

First Author: : E.Manche USA

Co Author(s): :    W. Lee              

Abstract Details


To determine the relationship between change in simulated keratometry (K) and corrected refractive error in both wavefront-guided (WFG) and wavefront-optimized (WFO) myopic photorefractive keratectomy (PRK), and to determine whether there is a difference in this relationship between these two ablation profiles.


Academic refractive surgical setting


68 patients received WFG PRK in one eye and WFO PRK in the contralateral eye. The changes in simulated K and corresponding refractive changes for both were determined at 1 year post-operatively. Linear regression was employed to calculate the slope of change in simulated K (ΔK) for change in refractive error (ΔSE) for both WFG and WFO PRK and compared. The mean ratio (ΔK / ΔSE) was also calculated for both WFG and WFO PRK and compared.


There was no significant difference in the ratio of (ΔK) to (ΔSE) between WFO and WFG PRK by both linear regression modeling and comparison of the mean ratio (ΔK / ΔSE). Linear regression modeling revealed that the ratio of (ΔK / ΔSE) was greater for small amounts of change in refractive error and smaller for large amounts of change in refractive error. This trend was only statistically significant for the WFO group when comparing the means of the ratio (ΔK / ΔSE) (p = 0.0287).


Change in corneal curvature induced for a given degree of refractive correction was similar for both WFO and WFG PRK. For both, a proportionally smaller amount of corneal flattening was required for larger degrees of refractive correction compared to smaller degrees.

Financial Disclosure:

One or more of the authors research is funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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