Biomaterial Database

[Rotation auto-keratoplasty. Preoperative calculation]. 1989

W Schroeder

Augenabteilung Allgemeines Krankenhaus Heidberg, Hamburg.

A formula is given with which it is possible to calculate preoperatively the size of the eccentric trepanation in rotation autokeratoplasty and the resulting optimized visual center. On the patient's eye the position of the visual axis on the cornea, and the distance between this and the edge of the scar and the corneal limbus must be measured in the meridian where the scar extends least over the visual axis. The calculation can be performed very quickly with the aid of a diagram based on the formula r = 0.25(3R-x-2).

UI	MeSH Term	Description	Entries
D003318	Corneal Opacity	Disorder occurring in the central or peripheral area of the cornea. The usual degree of transparency becomes relatively opaque.	Leukoma,Corneal Opacities,Leukomas,Opacities, Corneal,Opacity, Corneal
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D014792	Visual Acuity	Clarity or sharpness of OCULAR VISION or the ability of the eye to see fine details. Visual acuity depends on the functions of RETINA, neuronal transmission, and the interpretative ability of the brain. Normal visual acuity is expressed as 20/20 indicating that one can see at 20 feet what should normally be seen at that distance. Visual acuity can also be influenced by brightness, color, and contrast.	Acuities, Visual,Acuity, Visual,Visual Acuities
D016039	Corneal Transplantation	Partial or total replacement of the CORNEA from one human or animal to another.	Grafting, Corneal,Keratoplasty,Keratoplasty, Lamellar,Transplantation, Corneal,Cornea Transplantation,Transplantation, Cornea,Cornea Transplantations,Corneal Grafting,Corneal Graftings,Corneal Transplantations,Graftings, Corneal,Keratoplasties,Keratoplasties, Lamellar,Lamellar Keratoplasties,Lamellar Keratoplasty,Transplantations, Cornea,Transplantations, Corneal
D055095	Optics and Photonics	A specialized field of physics and engineering involved in studying the behavior and properties of light and the technology of analyzing, generating, transmitting, and manipulating ELECTROMAGNETIC RADIATION in the visible, infrared, and ultraviolet range.	Photonics,Photonics and Optics