Here are some simple and sound rules for care of the eyes, as formulated
by a recognized authority on the subject. Avoid reading and study by
poor lights. Light should come from the side of the reader, and not from
the back nor from the front. Do not read or study while suffering great
bodily fatigue or during recovery from illness. Do not read while lying
down. Do not use the eyes too long at a time for anything that requires
close application, but give them occasional periods of rest. Reading and
study should be done systematically. During study avoid the stooping
position, or whatever tends to produce congestion of the blood in the
head and face. Read with the book on a level with the eyes, or nearly
so, instead of in your lap. Select well printed books. Correct
imperfection in sight with proper glasses, not selected carelessly by
yourself or bought from an irresponsible wandering peddler, but properly
fitted by an educated optician. Avoid bad hygienic conditions and the
use of alcohol and tobacco. Take sufficient exercise in the open air.
Let physical culture keep pace with mental development, for imperfection
in eyesight is most usually observed in those who are lacking in
physical development.