<unk> , also known as<unk>  grafting, is a surgical procedure where a damaged or diseased<unk> is replaced by donated<unk>  tissue (the graft). When the entire<unk> is replaced it is known as penetrating keratoplasty and when only part of the<unk> is replaced it is known as lamellar keratoplasty. Keratoplasty simply means surgery to the<unk>  The graft is taken from a recently deceased individual with no known diseases or other factors that may affect the chance of survival of the donated tissue or the health of the recipient. The<unk> is the transparent front part of the eye that covers the iris, pupil and anterior chamber. The surgical procedure is performed by ophthalmologists, physicians who specialize in eyes, and is often done on an outpatient basis. Donors can be of any age, as is shown in the case of Janis Babson, who donated her eyes after dying at the age of 10.<unk>  is performed when medicines, keratoconus conservative surgery and cross-linking can no longer heal the<unk>  This surgical procedure usually treats<unk>  blindness, with success rates of at least 41% as of 2021.
Corneal transplantation
Conductive keratoplasty
Laser thermal keratoplasty
Phototherapeutic keratectomy
Excimer laser trabeculostomy
Boston keratoprosthesis
Descemet membrane endothelial keratoplasty
Photorefractive keratectomy