OCULAR DISTURBANCES PRODUCED IN EXPERIMENTAL ANIMALS BY DIETARY CHANGES

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Abstract
Investigators on nutrition have found that animal experimentation is necessary in carrying on their work. Much of the progress attained in this field was made possible by the use of small animals, particularly the albino rat. They reach their maturity and begin to breed at about 90 days of age, and they rarely live to be more than 3 years old. It has been calculated that each day of a rat's life is equivalent to thirty days of man's life. Thus it is possible to conduct experiments over a whole life span in a comparatively short time. The rat can be maintained in excellent nutritive condition on a synthetic, or rather an artificial, diet consisting of purified protein, fat, carbohydrate and inorganic salts, together with a supplement of the necessary vitamins. In studying the physiologic effects of any given component of the diet, the biologist often proceeds by feeding the

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