Patent ID: 8652044
Filing Date: 2014-02-18
Classification: A61B

Abstract:
1. A portable non-contact tonometer for measuring intra-ocular pressure of an eye of a subject comprising: a case; a liquid pulse generator; an orifice for delivering said liquid pulse onto a cornea of said subject, said orifice being in communication with said liquid pulse generator via a liquid flow plenum; wherein said liquid pulse applanates a cornea of said subject; an eye alignment detector subsystem to detect an eye position of said subject; a cornea applanation detector subsystem for detecting a cornea applanation event of said subject; a liquid pulse pressure sensor to measure pressure of said liquid pulse; a microprocessor subsystem comprising microprocessor and memory, for control of said tonometer and for computation and reporting a value of said intra-ocular pressure; a gaze target, said gaze target displaying moving target images a gaze target imaging subsystem restricting visibility of said gaze target, wherein an optical axis of said eye and an optical axis of said tonometer are aligned when said subject focuses on said gaze target; wherein said microprocessor subsystem receives information from said eye alignment detector subsystem and said gaze target imaging subsystem to confirm alignment of the optical axes of said eye and said tonometer; wherein, upon confirming alignment of said optical axes, said microprocessor subsystem initiates a randomized time delay; and wherein said liquid pulse generator delivers said liquid pulse onto said cornea following said randomized time delay.