The structure and functions of the eye, illustrative of the power, wisdom, and goodness of God / by Spencer Thomson.

  • Thomson, Spencer, 1817-1886.
Date:
1857
Catalogue details

Licence: Public Domain Mark

Credit: The structure and functions of the eye, illustrative of the power, wisdom, and goodness of God / by Spencer Thomson. 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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    THE HUMAN EYE—THE ORBITS OR EYE- SOCKETS. The orbits or sockets of the human eyes are two quadrilateral, hollow pyramids (Fig. I.), situated at the upper part of the face, and are formed by the union of portions of seven diffe- rent bones; they are pierced by nine foramina or holes, eight of which give passage to blood- vessels and nerves, the ninth to the duct (Fig. IV., B 4), by which the lachrymal fluid is con- ducted into the nose. In these bony cones, along with its mus- cles, nerves, blood-vessels, and other appen- dages, and suspended by a fascia of its own, is placed the eye-ball or globe, every space otherwise unoccupied being well filled up and cushioned with fat, and all care taken for the perfect inward security, but at the same time perfect mobility, of. the important tenant. Violence from without is provided against by the strong bulwark-like projection formed by the margin of the orbit itself. To ward off lesser external irritations which might prove obnoxious, there exists that beautiful combination of protecting agents, the tuta-