System and method for obtaining ocular tissue biomechanical parameters

Application Number: PCT/IB2019/053554

Date of receipt: 30 April 2019/ Madrid, Spain.

Link: https://patentscope.wipo.int/search/en/detail.jsf?docId=WO2019211761

The invention refers to a system (100) for obtaining biomechanical properties of ocular tissue, the system comprising: - an air-puff generator (10) configured to generate a stepped-frequency train of air-puff pulses of different frequencies for delivery onto the ocular tissue; - an imaging device (20) operatively coupled to the air-puff generator, the imaging device being configured to capture a plurality of axial positions of a region of the ocular tissue; - processing means (30) configured to: - process the plurality of axial positions provided by the imaging device for obtaining displacement and velocity of the region of the ocular tissue at the different frequencies; and to - carry out frequency domain analysis of the obtained displacements and velocities of the region of the ocular tissue at the different frequencies to at least derive a mechanical resonance frequency of the ocular tissue; and to - perform inverse calculation and obtain biomechanical parameters and intraocular pressure of the ocular tissue using the displacement, velocity and mechanical resonance frequency as inputs in a Fine-Element-Model based calculation. The invention also relates to a method for obtaining biomechanical parameters of ocular tissue.