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"Applied Eugenics"

1, New York, 1905.
[6] _A First Study of the Inheritance of Vision and the Relative
Influence of Heredity and Environment on Sight._ By Amy Barrington and
Karl Pearson. Eugenics Laboratory (London), Memoir Series V.
[7] Dr. James Alexander Wilson, assistant surgeon of the Opthalmic
Institute, Glasgow, published an analysis of 1,500 cases of myopia in
the _British Medical Journal_, p. 395, August 29, 1914. His methods are
not above criticism, and too much importance should not be attached to
his results, which show that in 58% of the cases heredity can be
credited with the myopia of the patient. In 12% of the cases it was due
to inflammation of the cornea (keratitis) while in the remaining 30% no
hereditary influence could be proved, but various reasons made him feel
certain that in many cases it existed. The distribution of myopia by
trades and professions among his patients is suggestive: 65% of the
cases among school children showed myopic heredity; 63% among housewives
and domestic servants; 68% among shop and factory works; 60% among
clerks and typists; 60% among laborers and miners. If environment really
played an active part, one would not expect to find this similarity in
percentages between laborers and clerks, between housewives and
schoolteachers, etc.


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