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Volume XI of Documenta Ophthalmologica, which is chiefly devoted to reporting advances in ophthalmology, contains an original paper by Gaffner on "angioscotometry." In a previous communication (Gaffner, F.: O phthalmologica 127:293, 1954) this author described what he calls "skia scotometry." He was able to demonstrate a connection between the "skia scotomas" and the isopters as determined by perimetry, in the part of the visual field from the fovea to within approximately 30 degrees of fixation. In the present paper he establishes a mathematical relationship between the velocity of the movement of the test object and retinal summation and calculates from these data the light energy necessary for the process of summation. His conclusions are as follows: 1. A relationship may be derived for a given point of the retina involving the velocity of motion as variable and the path of summation as function, provided that all other factors are kept
Documenta Ophthalmologica, Volume XI.. AMA Arch Ophthalmol. 1958;59(6):978. doi:10.1001/archopht.1958.00940070192021