Limbal-based eye tracking
AssigneeCustomVis PLC
InventorPaul Van Saarloos
Life of this patent
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Abstract
A method of determining and/or tracking the position of an eye, includes utilizing at least two wavelength components of a plural wavelength zone that traverses the limbus of the eye to obtain a profile of whiteness and/or redness across the zone, and identifying from the profile at least one predetermined reference position that indicates the position of the eye. Apparatus for carrying out the method is also disclosed.
Claims41
A method of determining and/or tracking the position of an eye, including:
- utilizing at least two wavelength components of a plural wavelength image of a zone that traverses the limbus of the eye to obtain a profile of whiteness and/or redness across the zone;
- and
- identifying from the profile at least one predetermined reference position that indicates the position of the eye.
Ophthalmic laser ablation apparatus including:
- means to deliver a pulsed laser beam for performing a laser ablation procedure on an eye of a patient;
- means positionable to view and record a plural wavelength component digital image of at least a zone of the eye of the patient that traverses the limbus of the eye;
- and
- analysis means connected to receive said digital image and programmed to:
- (i) utilize at least two wavelength components of a plural wavelength image of a zone that traverses the limbus of the eye to obtain a profile of whiteness and/or redness across the zone;
- and
- (ii) identifying from the profile at least one predetermined reference position that indicates the position of the eye.
A method according to 4 wherein said profile of whiteness is obtained from at least two of three wavelength components that mix to characterize the colors of the image.
Dependencies are inferred from the claim text.