Assessment of the Tomographic Values in Keratoconic Eyes After Collagen Crosslinking ProcedureSanja Sefic Kasumovic, Adisa Racic-Sakovic, Aida Kasumovic, Suzana Pavljasevic, Belkisa Duric-Colic, Emir Cabric, Milka Mavija, Orhan Lepara, Mirko Jankov.
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Goal: This study aimed to investigate the differences in values of K1 and K2 readings, the central corneal thickness (PAH ) before the collagen crosslinking procedure (CXL) and 3, 6, 12 months later. Methods: 64 eyes were evaluated in retrospective cross sectional study. The corneal biomechanical parameters were taken with WaveLight Allegro Oculyzer produced by Alcon before the CXL , 3,6, 12 months after the procedure. The curvature of K1 reading and K2 reading were taken and the central corneal thickness were considered due to the time after CXL. Results: The value of K1 reading before the treatment was 48.8 diopters (D) (46.65-50.50) and was statistically significant lower comparing to the value of K1 3 months after the collagen CXL procedure 46.30 D (43.57-49.45) (p=0.0006), K1 reading one year post collagen CXL procedure was 47.20 D (44.35-50.07) (p=0.002). The value of K2 reading before the collagen CXL procedure was 52.65 D (47.55-54.72), 3 months after the procedure was 51.4 (45.05-54.0), 6 months later 48.55 D (47.20-50.62), 12 months later 51.30 D (47.22-54.77). There is statistically significant lower value of K2 reading 6 months after the treatment comparing to the values 3 months postoperatively (p=0.014). However there is significantly lower values of K2 reading 12 months postoperatively comparing to preoperative period (p=0.006). The value of central corneal thickness preoperative was 431.0 microns (398.0-446.25), 3 months after collagen CXL procedure was 373.50 microns (363.25-430.75), 6 months later 435.0 microns (360.0-464.75), 12 months after the CXL procedure was 429.50 microns (357.75-496.25). There is statistically significant lower values of central corneal thickness 3 months after collagen CXL treatment comparing to the central corneal thickness preoperative (p
keratokonus, collagen crosslinking, riboflavin, ultraviolet irradiation, central corneal thickness, K1, K2 readings
American Journal of Preventive Medicine and Public Health
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