A complete physico-medical and chirurgical treatise on the human eye / [Peter Degravers].

  • Degravers, Peter
Date:
1788
Catalogue details

Licence: Public Domain Mark

Credit: A complete physico-medical and chirurgical treatise on the human eye / [Peter Degravers]. Source: Wellcome Collection.

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    been able to operate, I remain firmly convinced there is not one vein, that can be properly diftinguilhed as fuch, except thofe commonly called vorticofte of the choroides and iris, and their receptacles which join .the vena ophthalmica. Scrupulous obfervation on diffe- rent cafes has fairly indicated me to believe, that many arteries above mentioned have no veins, and that the blood does not return from them into the general cir- .culation, but ferves to fupply the vitreous body, cry-, iftaline lens, aqueous humor, and the tears which are not produced by the globe of the eye, befides the nutrition :of its coats. 'This idea being entirely new, will appear •very ftrange to opinionated anatomifts, but not fo to fuch as are practitioners. The conjunctiva and cornea are often overun with varicous veffels, that I have been obliged to deltroy, in order to effect a cure 5 and what as moft lingular, thefe varicous veffels gi*ow amazingly tfaft, and keep their ground as long as they are not de- iftroyed. in inflammatory cafes, I have frequently feen 'the blood in the tranfparent cornea of the Eye, and in ithe iris, and profufe bleeding unable to difpel it ; there** ifore, it is no wonder if anatomifts have been at a lofs ito deferibe the veins, and their fituations ; but we ought ito wonder why they have hazarded to qualify fo many •veffels, as veins, whilft they arc in fact real blood and lymphatic arteries. See the phyfiological enquiry which (follows the anatomical expofition. The optic nerve is not the only nerve which goes to ithe Eye ; fome branches come from the common motores \oculi, the ciliary nerves, the fuperior maxillary nerve, The ophtbalmici, patheticiy and a branch of the hard porti- lon of the auditive nerve. ANA-
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