ArticleBeyoglu eye journal2025
Comparison of the Depth of the Stromal Demarcation Line and Clinical Outcomes in Corneal Crosslinking Treatment with Hydroxypropyl Methylcellulose-Based and Vitamin E-TPGS-Based Riboflavin Solutions.
Article in Beyoglu eye journal, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objectives: This study aims to compare the visual and topographic results and the depth of demarcation line in patients who underwent epithelial-off-cross-linking (CXL) with riboflavin solutions containing D alpha-tocopheryl polyethylene-glycol 1000 succinate (Vitamin E-TPGS) and 1.1% hydroxypropyl methylcellulose (HPMC). Methods: Patients with progressive keratoconus, 26 treated with HPMC (Group 1) and 34 treated with Vitamin E-TPGS (Group 2), were evaluated retrospectively. Best corrected visual acuity, spherical equivalent, refractive cylinder, and corneal topography parameters (keratometry of flat and steep meridians (K1 and K2), maximum keratometry (Kmax), central, thinnest, and apical corneal thickness) at baseline and post-operative follow-up visits were compared (1, 3, 6, and 12 months). Corneal stromal demarcation line depth (DLD) was measured centrally, nasally, and temporally (1.5 mm and 3 mm distance from the center of the cornea) by anterior segment optical coherence tomography at 1 month post-operatively, and changes in endothelial cell density (ECD) at 6 months were compared between the two groups. Results: There was no difference between the two groups in terms of age and gender. The mean DLD was deeper in group 1 (325.95±76.55 µm) than in group 2 (267.94±54.2 µm) (p=0.002). In the 3 Conclusion: HPMC-based riboflavin appears to be associated with a deeper demarcation line than Vitamin E-TPGS-based riboflavin. While a decrease in K values was observed in the earlier period in HPMC, no difference was observed between Vitamin E-TPGS and HPMC at the 12
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