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July 29, 1899, Vol XXXIII, No. 5 >
ARTICLE | July 29, 1899

Misleading Statements and Illustrations in School Physiologies, Physics, and in Text-Books on Diseases of the Eye.

F. G. Murphy, M.D.
JAMA. 1899;XXXIII(5):271-272. doi:10.1001/jama.1899.02450570029003.
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ABSTRACT

Kansas City, July 21, 1899.

To the Editor:  —If parallel rays of light focus on the retina and the image is inverted, why is the image not reinverted in myopia where the rays cross before they reach the retina; does the image of objects focus at a point as it seems to do in Figure I; and if the crystalline lens brings rays of light to a focus on the retina where would they focus if the lens were removed, and would the image be inverted? These are the questions students ask after seeing the statements and illustrations in the various text-books.Most text-books contain an illustration correctly showing the manner in which rays of light reach the retina, and many that are incorrect.As far as I know Figures 1, 2, 3 and 4 are the ones used the world over to illustrate errors of refraction, and they are

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