| keratophakia | Implantation of a donor cornea or plastic lens within the corneal stroma to modify refractive error. Synonym: keratophakic keratoplasty. Origin: kerato-+ G. Phakos, lens (05 Mar 2000) |
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| keratophakic keratoplasty | Implantation of a donor cornea or plastic lens within the corneal stroma to modify refractive error. Synonym: keratophakic keratoplasty. Origin: kerato-+ G. Phakos, lens (05 Mar 2000) |
| keratophyte | <zoology> A gorgonian coral having a horny axis. Origin: Gr, a horn + a plant. Source: Websters Dictionary (01 Mar 1998) |
| keratoplasia | The formation or renewal of a horny layer. Origin: kerato-+ G. Plasso; to fashion (05 Mar 2000) |
| keratoplasty | A surgical procedure to replace a damaged cornea with a healthy one from a donor's eye. Unlike transplantation of most other organs, the cornea tends to have a problem with transplant rejection. Corneal transplants are indicated in cases of severe corneal injury or corneal infection (corneal ulcer) which has left the cornea scarred. (27 Sep 1997) |
| keratoplasty, penetrating | Partial or total replacement of all layers of a central portion of the cornea. (12 Dec 1998) |
| keratoprosthesis | Replacement of the central area of an opacified cornea by plastic. Origin: kerato-+ G. Prosthesis, addition (05 Mar 2000) |
| keratorefractive surgery | 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) |
| keratorrhexis | Rupture of the cornea, due to trauma or perforating ulcer. Origin: kerato-+ G. Rhexis, a bursting (05 Mar 2000) |
| keratorus | Vault-like corneal herniation with severe regular myopic astigmatism. Origin: kerat-+ L. Torus, swelling, knot, bulge (05 Mar 2000) |
| keratosa | <zoology> An order of sponges having a skeleton composed of hornlike fibres. It includes the commercial sponges. Origin: NL, fr. Gr, a horn. Source: Websters Dictionary (01 Mar 1998) |
| keratoscleritis | Inflammation of both cornea and sclera. (05 Mar 2000) |
| keratoscope | <instrument> An instrument marked with lines or circles by means of which the corneal reflex can be observed. Synonym: Placido da Costa's disk. Origin: kerato-+ G. Skopeo, to examine (05 Mar 2000) |
| keratoscopy | 1. Examination of the reflections from the anterior surface of the cornea in order to determine the character and amount of corneal astigmatism. 2. A term first applied by Cuignet to his method of retinoscopy. Origin: kerato-+ G. Skopeo, to examine (05 Mar 2000) |
| keratose | 1. <physiology> A tough, horny animal substance entering into the composition of the skeleton of sponges, and other invertebrates. Synonym: keratode. 2. <zoology> Containing hornlike fibres or fibres of keratose; belonging to the Keratosa. Origin: Gr, horn. Source: Websters Dictionary (01 Mar 1998) |