Anatomy and physiology of the eye, with hints for the preservation of the eyesight (1901)
Herbert, John Frederick, 1860- · Philadelphia, Pa., The author · leaf 38
powerof observation for distant objects is limited, and the morethey accommodate and try to see, the more blurred be-comes the image of the distant ol)ject. Treatment is merely orthopedic and preventive. Thecondition cannot l^e altered. Hygienic methods with thecorrection of the refractive error so… … Figure 19. A proper coucave lens placed in front of this eye will lengthen the rays fromF to F so that they will focus exactly on the retina. The weakest concave glasses which enable such eyes tounite divergent rays directly upon the retina, should beworn. Myopes who continue to strain their eyes…
Eye · Lenses
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