Arrangement for measuring movement of eye in e.g. ophthalmologic laser system during e.g. photo-dynamic therapy, has arithmetic unit for determining temporary displacement of speckle pattern based on two cutout images

摘要

The arrangement has a two-dimensional spatial resolution detector e.g. spatial resolution camera sensor (15) for repeated receiving of cutouts of an eye (2) in cutout images, where the detector is designed as a detector of a laser mouse. A light source (12) e.g. infrared LED, illuminates a sclera of the eye with coherent light. The detector receives a part of the speckle pattern in the cutout images. An arithmetic unit determines a temporary displacement of the speckle pattern based on the two cutout images and determines a movement of the eye based on the determined displacement. Independent claims are also included for the following: (1) a method for measurement of a movement of an eye (2) a computer program having a set of instructions for performing a method for measurement of a movement of an eye.