Mathematical model of a Placido disk keratometer and its implications for recovery of corneal topography.

Rand, R H; Howland, H C; Applegate, R A

Rand, R H; Howland, H C; Applegate, R A.

Afiliación

Rand RH; Department of Theoretical and Applied Mechanics, Cornell University, Ithaca, New York, USA. rand@rand.tam.cornell.edu

Optom Vis Sci ; 74(11): 926-30, 1997 Nov.

Article en En | MEDLINE | ID: mdl-9403889

RESUMEN

The purpose of this paper is to illustrate the importance of radial contours in the target pattern of a Placido disk keratometer. We do so by presenting an example of a corneal surface which cannot be determined solely by the use of Placido ring images, but rather which requires radial contours for its determination. In order to prove our assertions, we derive partial differential equations (called the corneal transform), which relate the ring targets to their images.

Asunto(s)

Córnea/anatomía & histología; Modelos Anatómicos; Humanos

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Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Córnea / Modelos Anatómicos Límite: Humans Idioma: En Revista: Optom Vis Sci Asunto de la revista: OPTOMETRIA Año: 1997 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos

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