Lynde, Carleton John, b. 1872 · New York : Macmillan · leaf 280
ses 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, see A, Fig. 195. To overcome this difficulty, spectacles withdiverging lenses are used, and the proper lens is one which willcause… … Fig. 195. — Spectacles.
Physics · Home Economics
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