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MYRA L. JOHNSON, Ph.D.

Arch Ophthal. 1943;29(5):793-810.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

Although night blindness and various other ocular disturbances have for centuries been associated with a dietary deficiency of the body, it is only within recent years, through the work of Fridericia and Holm,¹ Tansley² and others, that vitamin A deficiency has been identified as the specific cause of these visual defects. Still more recently the investigations of Wald³ have revealed that vitamin A is directly concerned with the visual process in that it is the precursor of visual purple as well as a product of its decomposition. It has been shown also, in experimental studies, that adult human subjects (Wald, Jehgers and Arminio,⁴ Wald and Steven,⁵ Booher, Callison and Hewston⁶ and Steven and Wald⁷) and infants (Lewis and Haig⁸) kept on a diet low in vitamin A until a certain degree of night blindness was exhibited recovered normal vision with startling rapidity . . . [Full Text PDF of this Article]

Author Affiliations
NORTHAMPTON, MASS.

Knapp Fellow in Ophthalmology, Columbia University College of Physicians and Surgeons.

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