Diseases of the eye : a manual for students and practioners / by J. Herbert Parsons.

  • Parsons, John Herbert, Sir, 1868-1957.
Date:
1912
Catalogue details

Licence: In copyright

Credit: Diseases of the eye : a manual for students and practioners / by J. Herbert Parsons. Source: Wellcome Collection.

Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)

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    DISEASES OF THE EYE. SECTION I. ♦ ANATOMY AND PHYSIOLOGY. CHAPTER I. ANATOMY. The sensory nerves of the body are provided with end organs, by means of which they receive specific physical stimuli and transform them into nerve impulses. The nerves of the special senses are no exceptions to the rule, and the eye is the highly differentiated and complex end organ of the sense of sight. The wall of the globe is composed of a dense, elastic supporting membrane (Fig. 1). The anterior part of the membrane is transparent—the cornea; the remainder is opaque—the sclerotic. The anterior part of the sclerotic is covered by mucous membrane—the conjunctiva—which is reflected from its surface on to the lids. The cornea consists of three layers : the epithelium, the substantia propria, and Descemet's membrane. The epithelium, which is stratified, may be regarded as the continuation of the conjunctiva over the cornea proper. It lies upon a homogeneous lamina of the substantia