Abstract:Corneal collagen cross-linking (CXL) is a photochemical method which uses light to irradiate the cornea infiltrated by photosensitizers, leading to covalent bond formation (i.e., crosslinks) within and between macromolecules, potentially including collagen and other matrix proteins. This method stiffens the cornea and maintains its biomechanical stability. The traditional ribo?avin ultraviolet-A-induced corneal collagen cross-linking (UVX) uses ribo?avin as a photosensitizer, and then the cornea is irradiated by 370 nm ultraviolet light. Although UVX can certainly maintain corneal biomechanical stability, its side effects and limitations cannot be ignored. As a novel CXL technology, collagen cross-linking with rose bengal-green light (RGX)uses rose-bengal as a photosensitizer that is irradiated by 532 nm green light. RGX can be used to treat keratoconus, infectious keratitis and promote corneal wound healing. This paper summarizes its principle and process, safety and effectiveness, as well as its ocular applications and its comparison with UVX.
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