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Carotenoids and the Vitamin A Cycle in Vision


SINCE reporting the occurrence of vitamin A in the eye tissues of the frog and several mammals1, I have examined the carotenoids of the frog's eye in detail.


  1. Wald, G., NATURE, 132, 316, August 26, 1933.

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  2. Kühne, W., “Hermanns Hdbch. der Physiol.”, 3/1, 235; Leipzig, 1879.

  3. Kuhn, R., and Lederer, E., Ber., 66, 488; 1933.

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  4. Hyrtl, Sitzber. Akad. Wien, 43, Abt. 1, 207; 1861.

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WALD, G. Carotenoids and the Vitamin A Cycle in Vision. Nature 134, 65 (1934).

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