Anatomy and physiology of the eye, with hints for the preservation of the eyesight (1901)
Herbert, John Frederick, 1860- · Philadelphia, Pa., The author · leaf 44
Figure .i.Horizo:.tal meridian is normal. Vertical meridian is myopic 4. Ill compound myopic astigmatism, the rays passingthrough both principal meridians fall short and are focusedbefore they reach the retina ; those in one direction com- 3S ing to a focus more quickly than those situated at right… … iMgure 25.15oih iiiei idiaiis are hypermetropic. The horizontal is more so than the \ertical. varieties. The person is hypermetropic in one directionand myopic in the other. The rays coming through oneprincipal meridian are brought to a focus before they reachthe retina, and the rays coming in at…
Eye · Lenses
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