4.1 Review

Therapeutic non-ectasia applications of cornea cross-linking

Journal

CLINICAL AND EXPERIMENTAL OPTOMETRY
Volume 106, Issue 6, Pages 580-590

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/08164622.2022.2159790

Keywords

Corneal cross-linking; Customized corneal crosslinking (CurV); Photoactivated chromophore for infectious keratitis (PACK)-CXL; Photorefractive intrastromal CXL (PiXL)

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Corneal cross-linking is a technique using riboflavin and ultraviolet-A light to strengthen corneal tissue. It has been effective in treating corneal ectasia and has expanded into other applications such as treating microbial keratitis and correcting refractive error. This review provides an overview of current evidence and future developments in non-ectasia applications of corneal cross-linking.
Corneal cross-linking is a photopolymerization technique traditionally used to strengthen corneal tissue. Corneal cross-linking utilizes riboflavin (vitamin B2) as a photosensitizer and ultraviolet-A light (UVA) to create strong covalent bonds within the corneal stroma, increasing tissue stiffness. Multiple studies have demonstrated corneal cross-linking's effectiveness in treating corneal ectasia, a progressive, degenerative, and non-inflammatory thinning disorder, as quantified by key tomographic, refractive, and visual parameters. Since its introduction two decades ago, corneal cross-linking has surpassed its original application in halting corneal ectatic disease and its application has expanded into several other areas. Corneal cross-linking also possesses antibacterial, antienzymolytic and antioedematous properties, and has since become a tool in treating microbial keratitis, correcting refractive error, preventing iatrogenic ectasia, stabilising bullous keratopathy and controlling post keratoplasty ametropia. This review provides an overview of the current evidence base for the therapeutic non-ectasia applications of cornea cross-linking and looks at future developments in the field.

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