Topography-guided LASIK (TGL) v SMILE: digitized study of corneal refractive effect centration (REC) to visual axis

Session Details

Session Title: LASIK and Imaging

Session Date/Time: Tuesday 10/10/2017 | 14:00-15:20

Paper Time: 14:55

Venue: Room 4.1

First Author: : V.Skouteris GREECE

Co Author(s): :    A. Kanellopoulos                    

Abstract Details

Purpose:

To define and compare the REC in LASIK vs. Smile, to possibly explain the refractive performance differences noted between the two.

Setting:

LaserVision.gr Clinical and Research Eye Institute, Athens, Greece

Methods:

In 22 consecutive patients, one eye, randomized had TGL, the contralateral Smile. Digital analysis of the REC to the aimed corneal vertex (ACV), was assessed on the peri-operative Scheimpflug tangential curvature maps, and correlated with refraction, acuity, anterior corneal symmetry indices, scatter, and low contrast sensitivity.

Results:

ACV vs. REC was 130 ± 62 μm in LASIK, but 313 ± 144μm in Smile (P<0,001). Index of Height Decentration (IHD) 0.0142± 0.0113 μm vs. 0.0225±0.0099 μm, objective scatter index (OSI): 1.14±0.82 vs. 1.14±0.82, low contrast sensitivity (LCS) improved in LASIK eyes vs. remained the same in the Smile.

Conclusions:

TGL offered significantly higher effective centration vs. Smile resulting relevant differences in IHD, OSI, and LCS.

Financial Disclosure:

NONE