A treatise on the diseases of the eye and their remedies : to which is prefixed, the anatomy of the eye, the theory of vision, and the several species of imperfect sight : illustrated with copper plates / by Geo. Chandler, surgeon.

  • Chandler, George, 1915-1992
Date:
MDCCLXXX [1780]
Catalogue details

Licence: Public Domain Mark

Credit: A treatise on the diseases of the eye and their remedies : to which is prefixed, the anatomy of the eye, the theory of vision, and the several species of imperfect sight : illustrated with copper plates / by Geo. Chandler, surgeon. 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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    Various colours in various perfons is called iris $ the pofterior furface, which is covered with a black pigment, Uvea, and the round hole ob- fervable in the middle of it, the pupil. Behind the uvea are obferveable fhort, oblong, white fibres, arifing by fine pale lines or ftreaks, f<?arce perceptible, from the infide of the cho- roides near the orbicuius ciliaris, and which be- coming gradually thicker, whiter and clofer, rtin over the forepart of the vitreous humor^ where they are received into (light ciepreflions or furrows, to which they are ftrongly adherent, and terminate at the margin of the chryftalline lens: thefe are called ciliary ligaments or pro- cejfes, and their interfpaces are every where filled up with a black pigment, iuch as befmears the internal furface of the choroides, and back of the uvea, The choroides is quite opake in all its parts 5 by which means it allows no light to pafs but what enters by that circular hole in its forepart called the pupil: and this opacity is yet more encreafed by a black pigment with which it is all over covered, and which makes this menv* brane appear black, though it be really white* a^ any body may be afifured of by f< raping and wafhingoff this colour which ealily fcparates. E The