| penetrating keratoplasty | Corneal transplant with replacement of all layers of the cornea, but retaining the peripheral cornea. Synonym: perforating keratoplasty. (05 Mar 2000) |
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| keratoplasty, penetrating | Partial or total replacement of all layers of a central portion of the cornea. (12 Dec 1998) |
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| penetrating ulcer | An ulcer extending into deeper tissues of an organ. (05 Mar 2000) |
| penetrating wound | A wound with disruption of the body surface that extends into underlying tissue or into a body cavity. (05 Mar 2000) |
| wounds, penetrating | Wounds caused by objects penetrating the skin. (12 Dec 1998) |
| eye injuries, penetrating | Deeply perforating or puncturing type intraocular injuries. (12 Dec 1998) |
| allopathic keratoplasty | Corneal transplant with donor material of glass, plastic, or other inert material. (05 Mar 2000) |
| autogenous keratoplasty | Corneal transplant with donor material from the same individual. (05 Mar 2000) |
| refractive keratoplasty | Any procedure in which the shape of the cornea is modified, with the intent of changing the refractive error of the eye; for example, if the cornea is flattened, the eye becomes less myopic. See: photorefractive keratectomy, keratophakia, lamellar keratoplasty, thermokeratoplasty, keratomileusis, radial keratotomy. Synonym: keratorefractive surgery. (05 Mar 2000) |
| perforating keratoplasty | Corneal transplant with replacement of all layers of the cornea, but retaining the peripheral cornea. Synonym: perforating keratoplasty. (05 Mar 2000) |
| heterogenous keratoplasty | Corneal transplant with donor material from another species. (05 Mar 2000) |
| homogenous keratoplasty | Corneal transplant with donor material from another individual of the same species. (05 Mar 2000) |
| nonpenetrating keratoplasty | Keratoplasty in which only the anterior layer of the cornea is used (not a tectonic keratoplasty). Synonym: lamellar keratoplasty, layered keratoplasty. (05 Mar 2000) |
| optical keratoplasty | Transplantation of transparent corneal tissue to replace a leukoma or scar that impairs vision. (05 Mar 2000) |
| tectonic keratoplasty | Grafting to replace lost corneal tissue. (05 Mar 2000) |
| total keratoplasty | Corneal transplant in which the entire cornea is removed and replaced. (05 Mar 2000) |