Digital Infrared Fundus Reflectance |
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Authors: | Samuel Packer Karen Schneider Hong-Zen Lin Michael Feldman |
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Affiliation: | 1. Ocular Tumor Service, Division of Ophthalmology, North Shore University Hospital, Manhasset, NY;2. Department of Ophthalmology, Cornell University Medical College, New York |
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Abstract: | An infrared sensor was inserted at the film plane of a fundus camera. The signal was visualized on an oscilloscope. In this manner we measured infrared reflectance from the surface of the fundus. The purpose was to characterize choroidal malignant melanomas more reliably than is done with infrared color translation photography. Control lesions were choroidal nevi, metastatic tumors, and disciform macular degenerations. Correlations were made with radioactive phosphorus (32P) uptake, fluorescein angiography, and histopathologic findings. Several cases are presented, one in which this new method of infrared detection was the first diagnostic test to detect the spread of a choroidal melanoma. The simplicity of this technique and its increased accuracy justify the needed further refinements. |
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Keywords: | choroidal melanoma choroidal nevi fundus reflectance infrared melanoma diagnosis |
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