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H. M. TRAQUAIR

Arch Ophthal. 1939;22(6):947-967.

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

As a rule it is only when defects of the visual field develop slowly that their initial stages can be examined. The study of the methods for the detection of early changes is therefore confined to conditions in which the onset is gradual, such as pressure from a tumor, chronic toxic amblyopia and chronic glaucoma, and is best undertaken with eyes in which the presence of defects is suspected although visual symptoms have not been noticed by the patient. The apparently normal field in cases of supposedly unilateral glaucoma or toxic amblyopia and the fields in cases of enlargement of the pituitary body in which there are no visual symptoms afford suitable material for investigation.

These incipient changes can be elicited only by weak stimuli, such as are capable of disclosing a slight lowering of visual function in the affected area. In this connection two questions arise: First, what are . . . [Full Text PDF of this Article]

Author Affiliations
EDINBURGH, SCOTLAND

Footnotes
Read at the Seventy-Fifth Annual Meeting of the American Ophthalmological Society, Hot Springs, Va., June 5, 1939.

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