METHOD AND DEVICE FOR THE MAPPING OF INTRARETINAL PH AND DEVICE FOR THE PHOTOCOAGULATION OF PERIPHERAL RETINAL AREAS

摘要

The invention relates to a method of mapping the intraretinal pH of a retina which is marked by a pH-dependent fluorescent marker, in which the retina is illuminated with a first excitation radiation. According to the invention, a first image of the fluorescence emitted by the retina is formed as a bi-directional matrix of pixels at the wavelength of the peak of the fluorescence emission spectrum. Subsequently, the retina is illuminated with a second excitation radiation and a second image is formed of the fluorescence emitted thereby. Finally, the ratio at each pixel between the levels of fluorescence emitted in response to the two respective wavelengths is calculated, said ratio being representative of the pH of the retina, and a pH map of the retina is deduced.