CORNEAL STROMA THICKNESS EVOLUTION AFTER MYOPIC LENTICULAR EXTRACTION ON SCHWIND ATOS
Published 2022 - 26th ESCRS Winter Meeting
Reference: FP23 | Type: Abstracts | DOI: 10.82333/60fw-d204
Authors: Ivan Gabric* 1 , Maja Bohač 1
1Refractive and Cornea,Eye Clinic Svjetlost,ZAGREB,Croatia
Purpose
Evaluate the postoperative behavior of the central corneal stroma thickness and epithelial changes after myopic lenticule extraction by using a combined anterior segment OCT and placido disc topographer, and to compare the accuracy of laser in predicting the actual stromal change.
Setting
Eye Clinic Svjestlost, Zagreb, Croatia
Methods
Evaluate the postoperative behavior of the central corneal stroma thickness and epithelial changes after myopic lenticule extraction by using a combined anterior segment OCT and placido disc topographer, and to compare the accuracy of laser in predicting the actual stromal change.
Results
Data analysis was performed on 130 eyes from 65 patients who underwent uneventful lenticular extraction. Patient corneas were evaluated with MS39 AS-OCT preoperativley and on day 1, day 30 and day 90 post operativley. Mean attempted manifest refraction was -4.98 D (SD ± 1.18 D), mean attempted cylinder -0.53 (SD ± 0.64). Predicted lenticule tickness was 103 μm (SD ± 13 μm), mean thickness at day 1 was 84 μm (SD ± 20 μm), at day 30 mean thickness was 90.97 μm (SD ± 17.67), at day 90 it was 93.53 (SD ± 19.23).
Conclusion
Schwind ATOS femtosecond laser is predicting a bigger change in maximum lenticule thickness versus the achived thickness. After data analysis of attempted and achived spherical correction (95% within 0.5D) we conculded that the device is overestimating the amount of thissue to be used by about 10% at 90 days.