REFERENCES
- The movements of the iris by means of their ciliary nerves depend according to the researches by Mayo only upon the short root of the ganglion ophthalmicum, that arises from the nervus oculomotorius. The long root of the ganglion ophthalmicum, that arises from the trigeminus through the nervus nasalis, maintains only the sensitive innervation to the eye.
- Dibers. De internis oculi mutationibus. Göttingen, 1780.
- F. Muck, (praes. Tiedemann), thesis de ganglio ophthalmico et nervis ciliaribus animalium. Landish. 1815.
- Transactions of the Royal Society of Edinburgh.
- To find out whether changes of the corpus ciliaris also always occur together with the changes of the shape of the iris, I tried to dilate the pupil of a rabbit by eye drops of belladonna extract. The pupil dilated only after repeating this often, because belladonna extract overall exerts less of this action in mammals, and because the drops quickly flow through the very wide lacrimal puncta into the lacrimal ducts of the nose. I had the intention to kill the animal and then examine and compare the state of the sick and the healthy eye, to see whether the belladonna extract, that always changes the refractive state of the eye, caused a form of the ciliary band that differed from that in the healthy eye, together with the dilation of the iris. Only because I killed the animal by a cut in the medulla oblongata, suddenly both pupils totally constricted. I have later diverged from these experiments. If someone wants to repeat them, death should be caused by a manner that has little influence on the state of the pupils, by bleeding, for instance. – That the movements of the iris do not depend upon increased or decreased blood pressure in the vessels of the iris, one can clearly see in the leukaethiopic eye of the rabbit, where the arteriae ciliares longae can be followed in the live animal very clearly in their ramification in the iris. The trunks of these vessels preserve, as I have convinced myself repeatedly, the same lumen during contraction and expansion of the iris.