Anatomy and physiology of the eye, with hints for the preservation of the eyesight (1901)
Herbert, John Frederick, 1860- · Philadelphia, Pa., The author · leaf 43
Figure 23.Vertical ineridian is normal. Horizontal meridian is hyi)ermetropic. 3. In compound hypermetropic astigmatism the ra3^s aretoo long and are projected beyond the retina through boththe principal meridians, the point of focus however in onedirection being behind that of the other. See… … 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…
Eye · Lenses
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