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SAMUEL ENGEL, M.D.

Arch Ophthal. 1942;27(6):1184-1187.

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

The influence of the pupillary size on the field has found little consideration. In reviewing the standard works about perimetry and glaucoma I found only three short references to this subject. Traquair¹ wrote about the normal field: "The field may also be slightly diminished by a small pupil or increased by a large one if the test-object is very small, owing to the difference in the amount of light admitted to the eye. With moderately large test-objects the size of the pupil makes no appreciable difference." According to Peter,² "A large pupil will allow rays to fall farther forward on the retina than a contracted pupil." And in comparing the glaucomatous field on different occasions Duke-Elder³ said that "every care should be taken to maintain constancy in the conditions, such as the degree of illumination, the size of the pupil, the time of the day and its . . . [Full Text PDF of this Article]

Author Affiliations
SAN FRANCISCO

From the Department of Ophthalmology, Stanford University School of Medicine.

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