Removed<unk>  epithelium during CCR operation on an eye with post-LASIK complication, from Kymionis et al., 2009<unk>  involves application of riboflavin solution to the eye that is activated by illumination with UV-A light for approximately 30 or fewer minutes. The riboflavin causes new bonds to form<unk>  adjacent collagen strands and proteoglycans in the stromal layer of the<unk>  which recovers and preserves some of the<unk> s mechanical strength. The<unk>  epithelial layer is generally removed to increase penetration of the riboflavin into the stroma, a procedure known as the Dresden protocol. People that are considered for treatment must undergo an extensive clinical workup, including<unk>  tomography, computerized<unk>  topography, endothelial microscopy, ultrasound pachymetry, b-scan sonography, keratometry and biomicroscopy.
Corneal cross-linking
Corneal transplantation
Phototherapeutic keratectomy
Radial keratotomy
Laser thermal keratoplasty
Photorefractive keratectomy
Conductive keratoplasty
Descemet membrane endothelial keratoplasty