readCornealTopography: Read a Placido disk corneal topography file

Description Usage Arguments Value References Examples

View source: R/rPACI.R

Description

Read corneal topography files as exported by Placido disk corneal topographer. A corneal topographer is an ophthalmic clinical device that obtains measurements in the cornea (the anterior part of the eye). A Placido disk corneal topographer makes use of the Placido disk (see references), which produce a circular pattern of measurement nodes. This function assumes a file structure of 24 rings * 256 angles per ring, which is the typical distribution of commercial Placido disk topographers.

Usage

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Arguments

filepath

A file path to a corneal topography file exported by a Placido disk corneal topographer.

Value

A dataset containing the read corneal topography.

References

Rowsey, J. J., Reynolds, A. E., & Brown, R. (1981). Corneal topography: corneascope. Archives of Ophthalmology, 99(6), 1093-1100

Rand, R. H., Howland, H. C., & Applegate, R. A. (1997). Keratometer and Its Implications for Recovery of Corneal Topography. Optometry and vision science, 74(11).

Examples

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datasetN = readCornealTopography(system.file("extdata","N01.txt", package="rPACI"))
datasetK = readCornealTopography(system.file("extdata","K04.txt", package="rPACI"))

rPACI documentation built on July 8, 2020, 7:19 p.m.