Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 482
Hypermetropia (long sight). F in the diagram. But converging rays falling on itemerge in a parallel direction as on page 123, or divergeas in the second illustration on page 124. The use of spectacles to long or short-sighted peopleis a necessity, and the lenses used vary. The eye has … Myopia (short sight). usually the capacity of suiting itself to viewing objects—its accommodation, as it is termed—near or far. Butwhen the forepart of the eye is curved, and cannot adaptitself to distant objects, the person is said to be short-sighted. In long sight the axis of the eyeball is…
Scientific recreations
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