Patent ID: 8690331

Claim:
A corneal hydration sensing system, comprising: an illumination system configured to provide an illumination beam of terahertz radiation; an optical system arranged in an optical path of said illumination system to relay and direct at least a portion of said illumination beam of terahertz radiation onto a cornea of a subject and to receive at least a portion of terahertz radiation reflected from said cornea to provide a return beam of terahertz radiation; a detection system arranged in an optical path of said return beam of terahertz radiation, said detection system configured to provide a detection signal from detecting at least a portion of said return beam of terahertz radiation; and a signal processing system configured to communicate with said detection system to receive said detection signal, wherein said signal processing system processes said detection signal to provide a measure of an amount of hydration sensed in said cornea of said subject.