3D papillary image capturing by the stereo fundus camera system for clinical diagnosis on retina and optic nerve

摘要

Glaucoma is the second main cause of the blindness in the world and there is a tendency to increase this number due toudthe lifetime expectation raise of the population. Glaucoma is related to the eye conditions, which leads the damage to theudoptic nerve. This nerve carries visual information from eye to brain, then, if it has damage, it compromises the visualudquality of the patient. In the majority cases the damage of the optic nerve is irreversible and it happens due to increase ofudintraocular pressure. One of main challenge for the diagnosis is to find out this disease, because any symptoms are notudpresent in the initial stage. When is detected, it is already in the advanced stage. Currently the evaluation of the optic discudis made by sophisticated fundus camera, which is inaccessible for the majority of Brazilian population. The purpose ofudthis project is to develop a specific fundus camera without fluorescein angiography and red-free system to accomplish 3Dudimage of optic disc region. The innovation is the new simplified design of a stereo-optical system, in order to makeudcapable the 3D image capture and in the same time quantitative measurements of excavation and topography of opticudnerve; something the traditional fundus cameras do not do. The dedicated hardware and software is developed for thisudophthalmic instrument, in order to permit quick capture and print of high resolution 3D image and videos of optic discudregion (20° field-of-view) in the mydriatic and nonmydriatic mode.