Device for monitoring body functions

摘要

A device for monitoring body functions comprises a scleral contact lens (1) for locating and supporting the device on the eye and an optical system (21,22) supported by the contact lens (1) for directing light towards the eye and receiving light reflected from the iris (29) of the eye. The optical system comprises an array of discrete light emitters (21) for directing light towards the eye at a series of different distances from the optical axis and an array of discrete light receivers (22) for receiving light reflected from the iris (29) of the eye at a series of different distances from the optical axis whereby the dimensions of the pupil (30) can be determined.