THE occurrence of polysaccharide in the retina has been known for some time, but there has been no uniformity of opinion as to its exact situation and functional significance. Glycogen has been described in the retina of the frog (Ehrlich, 1883; Brammertz, 1915; Schmitz-Moorman, 1927), the rabbit (Brammertz, 1915), the cat, and man (Kojima and Nagao, 1953), and in the rabbit retina after subcutaneous and intravitreal injection of dextrose (Nakashima, 1926). On the other hand, Best (1903) was unable to demon- strate this substance in the frog retina.
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Geoffrey Serpell (1954) studied this question.
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