row, when the eye is rotated at right angles to the axis of the cylinder;and the diagonal rows, when the eye is rotated at 45° to the axis of the cylin-der. The length of each row measures on the lens an anole of 60°, liisectedby the central line of sight. The central image is, of course,… … Fig. 2While Fig. 1 represents, perhaps, the more significant comparison,because of the fact that the majority^of lenses worn are still of the flat type, 76 L () ^\ ]! /^^^ O I ! 1 C A L CO M I A X Y
Lenses · Eyeglasses
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