Indications include the following: * Optical: To improve visual acuity by replacing the opaque or distorted host tissue by clear healthy donor tissue. The most common indication in this category is pseudophakic bullous keratopathy, followed by keratoconus,<unk>  degeneration, keratoglobus and dystrophy, as well as scarring due to keratitis and trauma. * Tectonic/reconstructive: To preserve<unk>  anatomy and integrity in patients with stromal thinning and descemetoceles, or to reconstruct the anatomy of the eye, e.g. after<unk>  perforation. * Therapeutic: To remove inflamed<unk>  tissue unresponsive to treatment by antibiotics or anti-virals. * Cosmetic: To improve the appearance of patients with<unk>  scars that have given a whitish or opaque hue to the<unk>
Corneal transplantation
Conductive keratoplasty
Laser thermal keratoplasty
Phototherapeutic keratectomy
Excimer laser trabeculostomy
Boston keratoprosthesis
Descemet membrane endothelial keratoplasty
Photorefractive keratectomy