REFLECTION BASED CORNEAL TOPOGRAPHY SYSTEM USING PRISMS FOR IMPROVED ACCURACY AND METHOD OF USE

Provided herein is a corneal topography system (218) that utilizes a prism placed in optical alignment between the pattern generator (201), such as a Placido disk, and the eye. The corneal topography system may be a prismatic triangulating corneal topography system that utilizes light rays of angle...

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Bibliographic Details
Main Author VAN SAARLOOS, Paul Phillip
Format Patent
LanguageEnglish
Published 17.08.2023
Subjects
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
MEDICAL OR VETERINARY SCIENCE
SURGERY
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Summary:Provided herein is a corneal topography system (218) that utilizes a prism placed in optical alignment between the pattern generator (201), such as a Placido disk, and the eye. The corneal topography system may be a prismatic triangulating corneal topography system that utilizes light rays of angle θ at the edge of the prism not passing through the prism (202), and using the deviation of the light rays passing through the prism at that edge to calculate angle θ. With angle α calculated from the reflected image on the image sensor (209) intersecting with the light ray from the pattern generator (201) at angle θ at the reflection point on the corneal surface (207). This provides both the position and slope of the corneal surface (207) at that point. Also provided is a method for mapping a corneal surface of an eye of a subject utilizing an optical prism (202) to produce a reflection image from a corneal surface reflection point (206) on the corneal surface (207) of the eye.
Bibliography:Application Number: US202118012380