Measurement Of The Corneal Configuration After A Femtosecond Laser-Assisted In Situ Keratomileusis With A New Anterior Segment Optical Coherence Tomography

Published 2023 - 41st Congress of the ESCRS

Reference: PP12.14 | DOI: 10.82333/yz5n-d772

Authors: Jan Weindler* ¹ , Lars Mackenbrock ¹ , Tadas Naujokaitis ¹ , Gerd Uwe Auffarth ¹ , Ramin Khoramnia ¹

¹Department of Ophthalmology,University of Heidelberg,Heidelberg,Germany

Comparison of flap and stromal thickness in the intraoperative setting with measurements from a new anterior segment OCT (AS-OCT) after LASIK surgery.

University Eye Clinic Heidelberg, Heidelberg, Germany

16 eyes underwent myopic LASIK treatment with the Wave Light FS200 femtosecond laser and the Wave light EX500 excimer laser (Alcon, Fort Worth, Texas). AS-OCT ANTERION (Heidelberg Engineering, Heidelberg, Germany) was used for corneal imaging 3 month after LASIK treatment. Three AS-OCT measurements were performed per eye. Flap thickness was determined at 7 measurement points on the corneal AS-OCT image and compared with the intraoperative LASIK setting. Results were analyzed for statistical differences using a t-test. A p-value <0.05 was considered statistically significant. Data are presented as mean values with standard deviation.

Preliminary results on 8 eyes showed a flap thickness of 115±5 µm and a central stromal thickness of 325±18 µm for the intraoperative LASIK setting. The measurement with AS-OCT showed a flap thickness of 133±15 µm and a central stroma thickness of 308 ±15 µm. There was a statistically significant difference in the mean flap thickness and the central stroma thickness between the intraoperative setting and the AS-OCT (p<0,05, t-test).

AS-OCT measurement revealed a significant thicker flap and thinner stroma than the intraoperative setting.