METHOD FOR DETERMINING EXUDATES IN THE RETINA

摘要

The present invention relates to a method for detecting exudates and/or micro-exudates in the retina of an eye by imaging said retina with a polarisation sensitive optical coherence tomography (OCT) technique comprising the steps of a) illuminating the retina of said eye with light produced by a polarisation sensitive optical coherence tomography light source, b) scanning the retina with said light and collecting the reflection light or backscattered light generated in each scanned point in the retina of said eye using signal light collecting means, c) processing the interf erometric signals obtained in at least one polarisation channel, and d) determining the polarisation properties of said reflection light or backscattered light, and e) detecting exudates and/or micro-exudates in the retinal layers lying anterior to the retinal pigment epithelium, when the polarisation properties of the reflection light or of the backscattered light of a scanned point deviate from the polarisation properties of light backscattered at structures that are polarisation preserving or biref ringent.