A treatise on diseases of the eye : for the use of students and general practitioners : to which is added a series of test types for determining the exact state of vision / by Henry C. Angell.

  • Henry Clay Angell
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on diseases of the eye : for the use of students and general practitioners : to which is added a series of test types for determining the exact state of vision / by Henry C. Angell. Source: Wellcome Collection.

Provider: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.

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    CHAPTER I. (Supplementary.') ANATOMY AND PHYSIOLOGY. ANATOMY, It is proposed in this chapter to give simply the essentia] points in the anatomy and physiology of the eye, such as it would seem almost imperative that every student and practitioner should be familiar with. GENERAL DESCRIPTION OF THE EYEBALL. The spherical organ of vision, or globe of the eye, resting upon a cushion of fat within the orbital cavity, movable in all directions, directly communicating with the brain through the optic nerve, is best described, as a whole, by the use of geographical terms. The eyeball is the globe; the anterior pole, the centre of the cornea; the posterior pole, the centre of the fundus; and an imaginary line, passing through the centre of the globe, connecting the poles, is the axis. An imagi- nary plane, perpendicular to the axis dividing the globe into a posterior and anterior hemisphere, is the equator. The vertical meridian divides the