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Simultaneous topography-guided Photorefractive Keratectomy(PRK) combined with anterior segment optical coherence tomography(AS-OCT) guided Phototheurapeutic Keratectomy(PTK) for managing anterior corneal scarring

Poster Details

First Author: S.Imamoglu TURKEY

Co Author(s):    V. Kaya              

Abstract Details


To evaluate preliminarily the safety and efficacy of topography-guided PRK combined with AS-OCT guided PTK fort he management of anterior corneal scarring.


Liv Hospital, Istanbul, Turkey


In this retrospective noncomparative consecutive case series, AS-OCT guided PTK for treatment of anterior corneal scarring was followed by corneal topography-guided PRK to correct aberrations. The depth of PTK treatment was calculated by subtracting PRK ablation amount from preoperative AS-OCT measured scar depth. Topo-guided PRK was performed by using the Wavelight Oculyzer data. Postoperatively, central corneal clarity, change in best spectacle corrected visual acuity(BSCVA) and corneal topographical indices were evaluated.


Six eyes of 4 patients were treated. The mean follow-up was 4.5 months(3-6 months).All eyes (%100) had greatly improved central corneal clarity after treatment. Comparison of preoperative and postoperative corneal topographic indices showed significant improvement in all patients. Four eyes (%80) gained 2 or more Snellen lines of BSCVA. No eye lost a line of BSCVA at the last postoperative visit.


Topography guided PRK to correct aberrations combined with AS-OCT guided PTK could be a safe and effective treatment for anterior corneal scarring . Further studies with larger series and longer follow-up are needed to confirm these results.

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