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Article
May 1937

EARLY SIMPLE GLAUCOMA: ITS DIAGNOSIS AND MANAGEMENT

Author Affiliations

SAN FRANCISCO
From the Division of Ophthalmology, the University of California Medical School.

Arch Ophthalmol. 1937;17(5):896-915. doi:10.1001/archopht.1937.00850050144012
Abstract

Glaucoma is a collective term applied to all diseases of the eye the principal symptom of which is increase in the intra-ocular pressure. In certain eyes the intra-ocular tension is above the average normal but causes no functional changes ; this condition cannot be called glaucoma.

NORMAL INTRA-OCULAR TENSION

The tension of the normal eye in the vast majority of cases varies between 21 and 27 mm. of mercury. According to P. Knapp,1 Langenhan2 and Bruns,3 this is uninfluenced by sex or refraction, while Guglianetti4 found that temperature, humidity and atmospheric pressure did not play a rôle.

The intra-ocular pressure is not absolutely constant but shows certain slight variations. The influence of the variations of the blood pressure due to the respiratory rate and the pulse rate, as expressed by the rhythmic oscillations of the pressure, can be seen roughly by the movement of

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