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US 7,740,356 B2Granted
Monochromatic multi-resolution corneal topography target
AssigneeSarver & Associates, Inc.
InventorEdwin J. Sarver
Life of this patent
Estimating the term…
Abstract
A method to encode both high-resolution and low-resolution reflected features of a cornea to improve the measurements for reflection based corneal topography systems. The corneal topography reflective target provides for multiple resolutions of measurements to be obtained from a single acquisition.
Claims20
An corneal topography system for measuring the shape of the cornea of the eye comprising:
- a corneal topographical reflective target;
- a first light source;
- and
- a device which measures the radius of curvature of the cornea, wherein said corneal topographical target provides a multi-resolution image of multiple resolutions of measurement from a single measurement.
1 more element
A reflective pattern source for use with a corneal topography system for measuring the shape of the cornea of the eye comprising:
- a two dimensional surface, said two dimensional surface having a circular pattern thereon for measuring reflected light from a cornea, said pattern being a function of multiple resolutions of measurements of the shape of the cornea, said multiple resolutions representing at least both the short radius of curvature and long radius of curvature of said cornea.
A process for determining the shape of a cornea of an eye comprising:
- providing multiple resolutions of measurement of the radius of curvature of said cornea from a single measurement.
Dependencies are inferred from the claim text.