. Advanced lessons in practical physiology for students of medicine. Physiology. Fig. 114.—Loring's Ophthalmoscope, with Tiltixg Mirkor, Complete Disk of Lenses from — 1 to — S and 0 to + 7, .\nd Si,"pplement.\l Quadr.\nt Containing = .\ND ± 16 D. This Affords 66 Gl.\sses or Combinations from + 23 to — 24 D. to move in the same direction, and, in the myopic eye, in the opposite direction. Having in this way determined whether the Qyo is myopic or hypermetropic, measure the degree of tliis ametropia in the following manner: Place the ophthalmoscope in the anterior focal plane of the ar
. Advanced lessons in practical physiology for students of medicine. Physiology. Fig. 114.—Loring's Ophthalmoscope, with Tiltixg Mirkor, Complete Disk of Lenses from — 1 to — S and 0 to + 7, .\nd Si,"pplement.\l Quadr.\nt Containing = .\ND ± 16 D. This Affords 66 Gl.\sses or Combinations from + 23 to — 24 D. to move in the same direction, and, in the myopic eye, in the opposite direction. Having in this way determined whether the Qyo is myopic or hypermetropic, measure the degree of tliis ametropia in the following manner: Place the ophthalmoscope in the anterior focal plane of the artificial eye, i. e., 5 cm. in front of its cornea. Illuminate the pupil and accom- modate your own eye for a distant point. If th(> artificial eye is myopic, place behind the opening in the mirror concave lenses of different strengths, until the lens has been found which renders a certain part of the optic disk—for example, a peripheral blood-vessel—perfectly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Burton-Opitz, Russell, b. 1875. Philadelphia, London, W. B. Saunders Company
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