Patent ID: 9662008
Date: 2017-05-30
CPC Classifications: A61B,G06T

Claim:
1. A method of measuring a tear film layer thickness (TFLT) of an ocular tear film, comprising: (a) receiving at least one first image containing optical wave interference of specularly reflected light and a background signal from a region of interest of an ocular tear film while illuminated by a multi-wavelength light source; (b) detecting whether an eyelid blink was captured in the at least one first image; (c) removing any images in the at least one first image on which the eyelid blink was detected to produce at least one resulting image; (d) converting at least a portion of the at least one resulting image representing the optical wave interference of specularly reflected light from at least a portion of the region of interest of the ocular tear film into at least one color-based value; (e) comparing the at least one color-based value to a tear film layer optical wave interference model; and (f) measuring a TFLT of the at least a portion of the region of interest of the ocular tear film based on the comparison of the at least one color-based value to the tear film layer optical wave interference model.