Anatomy and physiology of the eye, with hints for the preservation of the eyesight (1901)
Herbert, John Frederick, 1860- · Philadelphia, Pa., The author · leaf 39
e glasses which enable such eyes tounite divergent rays directly upon the retina, should beworn. Myopes who continue to strain their eyes will onlyincrease their trouble, whereas should they wear suitableglasses they will check the disease. In such cases a con-cave lens is necessary to bring rays… … Chart used for the detection of astigmatism. To a normal eye all the linesshould appear equally distinct. in the other. The shape of the eye may be hkeiied tothat of the bowl of a spoon. This want of synmietr}^ in thedioptric apparatus is nearly always situated in the cornea,but similar…
Eye · Lenses
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