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To the Editor.
—Fundus photography allows excellent documentation and accurate sequential evaluations of retinal disease. When evaluating the appearance of a choroidal lesion, such as a large nevus or malignant melanoma, most ophthalmologists examine the lesion with a direct or indirect ophthalmoscope, record a "mental image" of its size and relationship to normal landmarks, and then quickly compare with previous fundus slides or photographs. We have found the use of a lighted magnifying slide viewer (Pana-Vue 1) to be very helpful in evaluating the retina with indirect ophthalmoscopy.A slide of the lesion to be examined is placed upside down in the viewer, providing the same inverted picture seen by the ophthalmoscopist. An assistant holds the viewer as close as possible to the condensing lens (Figure). The examiner can then, nearly simultaneously, compare his or her view of the lesion with the image in the viewer. This technique allows accurate
Bartley GB, Bullock JD. Evaluation of Fundus Lesions. Arch Ophthalmol. 1986;104(8):1124-1125. doi:10.1001/archopht.1986.01050200030020