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Topography-guided photorefractive keratectomy and collagen cross-linking for post-LASIK ectasia

Poster Details

First Author: D.Lin CANADA

Co Author(s):    S. Holland   J. Hogden   N. Davey              

Abstract Details


To evaluate results of topography-guided Photorefractive Keratectomy (TG-PRK) with collagen cross-linking (CXL) for post-LASIK ectasia using the Schwind Amaris Excimer laser.


Laser Refractive Clinic


Retrospective case series. Aim - evaluation of the outcome of post-LASIK ectasia eyes that underwent treatment with the Schwind Amaris 1050 excimer laser with CXL with modified Dresden protocol. Preoperative and post-operative uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), manifest refraction (MR) and topographic cylinder were analyzed after 12 months of follow-up.


24 eyes of post-LASIK ectasia underwent treatment, 12 had sufficient data at 12 months for analysis. 7 of 12 (58%) showed UDVA �â�‰�¥20/40 post-operatively. 4 (33%) had improved CDVA and 3 eyes (25%) gained two or more lines (p=0.03). None had lost CDVA. No case showed progression. Mean astigmatism was reduced from 2.82�Â�±1.98D to 0.98�Â�±1.09D (p=0.0008). Mean spherical equivalent was improved from -0.87�Â�±1.28D to -0.19�Â�±1.32D (p=0.05).


Early results of TG-PRK with CXL with the Schwind Amaris show efficacy and safety for post-LASIK ectasia eyes at one year. More than half had UDVA 20/40 or better post-operatively. CDVA improved two or more lines in 25%. The technique may be safe and effective for post-LASIK ectasia patients but longer follow up is needed.

Financial Disclosure:

receives consulting fees, retainer, or contract payments from a company producing, developing or supplying the product or procedure presented, travel has been funded, fully or partially, by a company producing, developing or supplying the product or procedure presented

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