Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 280
ases the eyes arenearsighted. The eye lenscannot be made thin enoughto focus, on the retina,light from a distant object,and the image is formedin front of the retina, seeAt Fig. 195. To overcome this difficulty, spectacles withdiverging lenses are used, and the proper lens is one which willcause…
Physics · Home Economics
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