In recent years, the importance of depth relationships within the fundus have become increasingly evident and this has been largely due to the use of the binocular ophthalmoscope. The depth aspects of such conditions as excavation of the disc in glaucoma and the protrusion of the disc in papilledema are obvious. However, more subtle depth relationships in lesions of the macula, choroid, or the location of vessels, for example, may be overlooked or not readily appreciated. In addition, when following a fundus lesions, such as a tumor, by means of photography, the addition of the third dimension greatly enhances this method. Thus, there is little doubt that the stereoscopic fundus photograph has a distinct advantage over that of the conventional type for the recording of fundus pathology.
For many years stereoscopic photographs have been made by various means. Apparently Thorner1 in 1909 was the first to publish a method
DONALDSON DD. A New Camera for Stereoscopic Fundus Photography. Arch Ophthalmol. 1965;73(2):253–267. doi:10.1001/archopht.1965.00970030255020
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