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

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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


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

Setting: Clinical and Research Eye Institute, Athens, Greece


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.


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.


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

Financial Disclosure:


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