Laurence, Lionel · London, School of Optics · leaf 279
of the eye, subtend equal angles, as shown in Fig. 287. Distance of Most Distinct Vision.—When a person views a near object soas to get the best possible general view of it, he unconsciously holds it, not athis near point, where the demand on accommodation would be very great,but at the most… … Fig. 287. hyperopia and nearer in myopia; it is decidedly nearer in youth, when Ac.is active, than in old age. Consequently, for the purpose of establishingf ormulse, a conventional value of 10 is taken as the average or standard dis-tance of most distinct vision. In the following articles the…
Optics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
