Abstract Infrared radiation has the capability of penetrating some types of opacities so that photographs can be made with infrared sensitive film of structures that cannot be seen by the human visual system. This technique was applied to ocular fundus photography in patients with various manifestations of diabetic retinopathy including retinal hemorrhages and exudates, neovascular tufts, marked proliferative tissue, and vitreous hemorrhage. In all such cases the infrared photographs depicted the optic disc, retinal vessels, and choroidal vasculature underlying the opacities when these structures could not be seen through the intervening opacities in routine photographs or on clinical examination. This technique has potential for revealing fundus abnormalities hidden from ordinary view by retinal or vitreous opacities. References 1. Dallow RL, McMeel JW: Infrared photography of the ocular fundus , in Pruett RC, Regan CDJ (eds): The Retina Congress . New York, Appleton-Century-Crofts, 1974. 2. Dallow RL: Color infrared photography of the ocular fundus . Arch Ophthalmol 92:254-258, 1974.Crossref 3. Duke-Elder S: System of Ophthalmology: Physiology of the Eye and of Vision . St. Louis, CV Mosby Co, 1968, vol 4, pp 454, 571. 4. Medical Infrared Photography , Kodak Publication No. N-1. New York, Eastman Kodak Co., 1969. 5. Dallow RL: Television Ophthalmoscopy: Instrumentation and Medical Applications . Springfield, Ill, Charles C Thomas Publisher, 1970. 6. Flower RW: Infrared absorption angiography of the choroid and some observations on the effects of high intraocular pressures . Am J Ophthalmol 74:600-614, 1972. 7. Behrendt T, Duane TD: Investigation of fundus oculi with spectral relectance photography . Arch Ophthalmol 75:374-379, 1966.Crossref 8. Ernest JT: Color translation fundus photography . Am J Ophthalmol 65:170-174, 1968.
Archives of Ophthalmology – American Medical Association
Published: Dec 1, 1974
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