Anatomy and physiology of the eye, with hints for the preservation of the eyesight (1901)
Herbert, John Frederick, 1860- · Philadelphia, Pa., The author · leaf 37
R-SIGHTED EYE. In myopia parallel visual rays are brought to a focusanterior to tle retina (see dotted lines in figure i8). Thecondition is either liereditary or acquired. In the formerit is generally due to a lengthening of the anteroposterioroptic axis or a state of too great a convergence of… … Figure i8. Parallel rays coming lo a focus at F before tliey reach the retina.Dotted line shows shape of normal eye. degree, whereas in the former it is of higher grades, whichalways have a tendency to increase. In myopes the powerof observation for distant objects is limited, and the morethey…
Eye · Lenses
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