Klemens Paul Kaiser1,2, Elfriede Wissiak1,2, Tom Müller1,2, Loay Daas3, Yosuf El-Shabrawi1, Navid Ardjomand4,5. 1. Universitäts-Augenklinik, Medizinische Universität, Graz, Österreich. 2. Sehzentrum für Augenlaser & Augenchirurgie, Leechgasse 58, 8010, Graz, Österreich. 3. Klinik für Augenheilkunde, Universitätsklinikum des Saarlandes, Homburg/Saar, Deutschland. 4. Universitäts-Augenklinik, Medizinische Universität, Graz, Österreich. navid@ardjomand.at. 5. Sehzentrum für Augenlaser & Augenchirurgie, Leechgasse 58, 8010, Graz, Österreich. navid@ardjomand.at.
Abstract
BACKGROUND: Corneal scars can severely impair visual performance and treatment can be challenging. The study aimed to evaluate a promising minimally invasive option in the treatment of corneal scars using transepithelial topography-guided ablation. METHODS: This retrospective interventional study involved four eyes of four patients who developed corneal scarring and irregular surfaces due to trauma and were treated with topography-guided photorefractive keratectomy (TG-PRK) between 2017 and 2020. The ablation profile was calculated in all four cases using CRS-Master (Zeiss, Jena, Germany). The main outcome measures were uncorrected and best-corrected distance visual acuity, manifest refraction and corneal regularity by topographic images. The mean age was 34.75 ± 15.39 years and the follow-up time was 6 months for all patients. RESULTS: In three cases full subjective refraction was corrected in one session and one patient had a refractive error of +0.5 D. Only corneal surface smoothing without additional refractive correction was performed in this case. All four patients showed improvement in uncorrected (2-3 Snellen lines) and corrected (3 Snellen lines) distance visual acuity. No complications occurred during or after the treatment and there was no reduction of visual acuity in any case. CONCLUSION: The use of TG-PRK in patients with corneal scarring improves visual acuity in selected cases. In myopic patients most of the refractive error can also be corrected in a single session.
BACKGROUND: Corneal scars can severely impair visual performance and treatment can be challenging. The study aimed to evaluate a promising minimally invasive option in the treatment of corneal scars using transepithelial topography-guided ablation. METHODS: This retrospective interventional study involved four eyes of four patients who developed corneal scarring and irregular surfaces due to trauma and were treated with topography-guided photorefractive keratectomy (TG-PRK) between 2017 and 2020. The ablation profile was calculated in all four cases using CRS-Master (Zeiss, Jena, Germany). The main outcome measures were uncorrected and best-corrected distance visual acuity, manifest refraction and corneal regularity by topographic images. The mean age was 34.75 ± 15.39 years and the follow-up time was 6 months for all patients. RESULTS: In three cases full subjective refraction was corrected in one session and one patient had a refractive error of +0.5 D. Only corneal surface smoothing without additional refractive correction was performed in this case. All four patients showed improvement in uncorrected (2-3 Snellen lines) and corrected (3 Snellen lines) distance visual acuity. No complications occurred during or after the treatment and there was no reduction of visual acuity in any case. CONCLUSION: The use of TG-PRK in patients with corneal scarring improves visual acuity in selected cases. In myopic patients most of the refractive error can also be corrected in a single session.
Authors: Gregor Leonhard Olmes; Julia Sarah Maria Zimmermann; Lisa Stotz; Ferenc Zoltan Takacs; Amr Hamza; Marc Philipp Radosa; Sebastian Findeklee; Erich-Franz Solomayer; Julia Caroline Radosa Journal: Arch Gynecol Obstet Date: 2021-08-05 Impact factor: 2.344