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Abstract

An infrared fundus angiography camera and ICG angiography imaging procedure for improved visualization and diagnosis of vascular diseases of the eye, especially SRNV, features a narrow bandwidth non-coherent and decollimated infrared illumination source, an optical system for directing the infrared illumination onto the retina and for directing the resulting retinal image toward an image storage device, and an optical filter positioned between the retina and the image storage device for blocking the infrared illumination from entering the image storage device. An infrared laser produces infrared illumination and a opal glass, fiber array, or integrating sphere light diffuser positioned between the infrared laser and the optical system decollimates and makes the infrared illumination incoherent. The laser includes a temperature stabilized infrared laser diode having an output matched to the excitation peak of an infrared fluorescent dye, such as ICG. The fundus camera includes an optical filter in the emission image path having a sharp cut-off response matched to the excitation and emission peaks of the infrared dye so that the filter substantially passes emission peak wavelengths and substantially blocks excitation peak wavelengths.

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First Claim