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Optical zone enlargement and recentration after previous myopic LASIK using topography guided custom ablation

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Session Details

Session Title: LASIK II

Session Date/Time: Tuesday 08/09/2015 | 14:00-16:00

Paper Time: 15:03

Venue: Room 10

First Author: : C.Yvon UK

Co Author(s): :    D. Reinstein   T. Archer   E. Miller   M. Gobbe   G. Carp        

Abstract Details


Report results of optical zone (OZ) enlargement and recentration using topography-guided ablation (TGA).


London Vision Clinic, London UK


75 eyes needing OZ enlargement or recentration after myopic LASIK were included. Corneal topography, corneal wavefront and manifest refraction were used to create the TGA.


SEQ was -0.52±0.99D (-3.75 to +1.00D) preop and -0.26±0.49D (-1.88 to +0.88D) postop with 72% ±0.50D and 95% ±1.00D. Postop UDVA (vs preop CDVA) was ≤20/20 in 80% (91%) and ≤20/25 in 91% (92%). No eyes lost 2 lines CDVA, contrast sensitivity was normal and unchanged. Spherical aberration was reduced by 39% and HO RMS was reduced by 24%. Topography demonstrated OZ enlargement and reduction of decentration.


TGA is an effective treatment for decentrations and OZ enlargement. Refractive accuracy was similar to standard LASIK.

Financial Interest:

One of the authors has significant investment interest in a company producing, developing or supplying product or procedure presented, One of the authors receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented

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