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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 27, Iss. 6 — Mar. 15, 1988
  • pp: 1135–1140

Corneal topography using computer analyzed rasterstereographic images

Joseph W. Warnicki, Paul G. Rehkopf, Diane Y. Curtin, Stephen A. Burns, Robert C. Arffa, and John C. Stuart  »View Author Affiliations


Applied Optics, Vol. 27, Issue 6, pp. 1135-1140 (1988)
http://dx.doi.org/10.1364/AO.27.001135


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Abstract

This paper describes a new method for determining corneal surface detail utilizing a modified Zeiss photo slit lamp. This system projects a grid onto the cornea through a cobalt blue filter. The tear film is stained with fluorescein, causing the projected grid pattern to be visible on the corneal surface. A video image of the grid is then digitized by an image processor which calculates surface detail by evaluating the distortion of the grid lines. Information on curvature and surface detail is obtained across the full corneal surface, both the central optical axis and peripherally beyond the limbus.

© 1988 Optical Society of America

History
Original Manuscript: June 26, 1987
Published: March 15, 1988

Citation
Joseph W. Warnicki, Paul G. Rehkopf, Diane Y. Curtin, Stephen A. Burns, Robert C. Arffa, and John C. Stuart, "Corneal topography using computer analyzed rasterstereographic images," Appl. Opt. 27, 1135-1140 (1988)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-27-6-1135


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References

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  16. Grid lines were projected onto a calibration object with a flat surface. The spacing between the lines has been measured and the distortions occurring from off-axis projection analyzed and quantified. Images are then normalized using this analysis.
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