On imaging based non-contact tonometer for intraocular pressure measurement

This article proposes a novel non-contact method of measuring intraocular pressure of human eye using an imaging technique, outside the clinical environment. The method facilitates measurement of intraocular pressure based on differences in the acquired images in the acquired images of a tow flap foils assembly before and after deflation due to an applied air puff of known pressure rebounding from the corneal surface. The flap foil assembly consists of thin black patterned engraved thin transparent flap foils placed between the eye and camera. The reflected air path depends on curvature and stiffness of the corneal surface, which in turn are related to the internal pressure of the eye. This method can be integrated with other optic disc image analysis symptoms of Glaucoma in early stages of screening.