Method and device for detection of eigenmodes of vibration of an eye by laser interferometry, and their application to the measurement of intraocular pressure (IOP).

摘要

Method for detecting at least one mode of vibration of an eye by laser interferometry. Said method comprises the following steps consisting in: - placing the eye (3) relative to a detection device (1) so as to form with this device a cavity Perot-Fabry main optical axis (A1) and consisting of two opposite reflecting faces on the main optical axis (A1). One of these sides is constituted by a reflecting element (M1) fixed and the other is formed by the cornea (2) of the eye (3); - injecting into the cavity a laser beam (F) incident, the lateral and longitudinal alignments of the cornea (2) relative to the main optical axis (A1) are made so that longitudinal interference is obtained between the laser beams back and reflected back between the two reflecting faces of the cavity (M1, 2); and - detected by an optoelectronic sensor (7) the intensity (I) at the time of the interference, said method is characterized in that the laser beam (F) incident is aligned and centered on the main optical axis (A1) of the cavity Fabry Perot-.