1. An apparatus for measuring a tear film layer thickness (TFLT) of an ocular tear film, comprising: a control system configured to: (a) receive 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 captured by an imaging device while illuminated by a multi-wavelength light source; (b) detect whether an eyelid blink was captured by the imaging device in the at least one first image; (c) remove any images in the at least one first image on which an eyelid blink was detected to produce at least one resulting image; (d) convert at least a portion of the at least one resulting image representing the optical wave interference of the 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) compare the at least one color-based value to a tear film layer optical wave interference model; and (f) measure the 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.