A lecture of the anatomy, physiology, & pathology of the eye : which was delivered to the members of the City of London Medical and Chirurgical Society / by Thomas Firth.
- Firth, Thomas
- Date:
- MDCCCXXXI [1831]
Licence: Public Domain Mark
Credit: A lecture of the anatomy, physiology, & pathology of the eye : which was delivered to the members of the City of London Medical and Chirurgical Society / by Thomas Firth. 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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![of the focket, to which it adheres all round, i reflected upon and covers the anterior half o the globe of the eye. The eye-lids are compofed of the commor teguments, a cartilage called tarfus, and an in ternal membrane. They have two angles or cor* ners, one the fmall or external, the other th large or internal angle. The form of each eye lid is that of a fegment or portion of a circL and in regard to the eye is fuch, that when bot eye-lids are fhut they make a uniform arcl adapted to the convexity of the eye, and in com tact with it: but in regard to one anotha when fhut, their edges are fo contrived, th they leave a fort of groove or channel boj tween them, which is narrow towards tlj outer angle, and wider towards the inner, at] ferves to conduct the tears as they come frcd the upper part of the eye, to what are call the lacrymal points. The margin of each eyi lid being of confiderable thicknefs, is dividj into the outer and inner edge. It is the ouJ edge only of each lid that is fuppofed to jcj when the eye-lids are fhut; the inner edj being formed oblique or flanting, makes 1J grool](https://iiif.wellcomecollection.org/image/b21633873_0058.jp2/full/800%2C/0/default.jpg)
