Patent ID: 8888286

Claim:
An apparatus for imaging an eye, comprising: a multi-wavelength light source configured to emit light to an eye; and a control system configured to: (a) spatially modulate light from the multi-wavelength light source to project a first circular pattern onto the eye, such that at least one first portion of the eye receives emitted light from the multi-wavelength light source and at least one second portion of the eye does not receive the emitted light from the multi-wavelength light source; (b) receive at an imaging device, at least one first image containing at least one first signal associated with an ocular property of the eye comprising at least one of corneal shape and ocular tear film thickness, comprises the emitted light reflected from the at least one first portion of the eye and at least one background signal; (c) spatially modulate light from the multi-wavelength light source to project a second circular pattern onto the eye, such that the at least one first portion of the eye does not receive emitted light from the multi-wavelength light source and the at least one second portion on the eye receives the emitted light from the multi-wavelength light source; (d) receive at the imaging device, at least one second image containing at least one second signal comprising only the at least one background signal; and (e) subtract the at least one second image from the at least one first image to generate at least one resulting image containing a resultant signal that represents the ocular property of the eye.