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1 year experience with corneal wavefront-guided treatments for complicated LASIK enhancements using the SCHWIND Amaris 750S laser: clinical outcomes

Session Details

Session Title: Complications in Refractive Surgery

Session Date/Time: Tuesday 11/09/2012 | 16:30-18:30

Paper Time: 16:36

Venue: Space 2 (South Wing, Level 0)

First Author: : T.Tan SINGAPORE

Co Author(s): :    Y. Por              

Abstract Details


To evaluate post-operative outcomes on refraction, corneal higher order aberrations and contrast sensitivity among previously operated eyes from various Excimer lasers that underwent LASIK re-treatments with the SCHWIND Amaris 750S. Cases were treated using corneal wavefront guided treatments for undercorrections, overcorrections, small optical zones and decentrations.


: Jerry Tan Eye Surgery, Singapore


50 consecutive eyes undergoing treatment using the Amaris 750S were enrolled. Pre and post-operative uncorrected and best corrected distance visual acuities, corneal and ocular wavefronts, and contrast sensitivities were performed. Corneal wavefronts were measured with the Scout and Sirius topographers, and ocular wavefronts with the IRX3 (Schwind Eye-Tech-Solutions, Kleinostheim, Germany), iTracey (HOYA Surgical Optics GmbH, EMEA Headquarters, Lyoner Stra├če 24-26, 60528 Frankfurt, Germany). Contrast sensitivity was performed using the functional vision analyser. Treatments were planned with the ORK-CAM software, and ablation performed with the Amaris 750S (Schwind Eye-Tech-Solutions, Kleinostheim, Germany). LASIK flaps were either re-lifted, recut with the Moria M2 Microkeratome or lasered upon using the TransPRK or LASEK procedure. Clinical outcomes were evaluated in terms of predictability of refractive outcomes, safety, corneal wavefront changes and contrast sensitivity.


At 3 months post-operatively, 100% of patients were within 1.00D of targeted refraction. No patient lost 2 or more lines of best corrected vision. Coma and spherical aberration were reduced in all cases and contrast sensitivity was improved in all cases.


Corneal wavefront guided treatments with the 750Hz Schwind Amaris 750S laser are safe and predictable when used for retreatments. Refractive errors and higher order aberrations were reduced post-operatively. Refraction accuracy was improved when spherical aberration was not treated in these previously treated eyes.

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