In the case of the man just mentioned a refitting quieted the nervous symptoms—he became more cheerful and ceased to worry. Indigestion and constipation improved. The soreness and contractures were overcome in a few treatments. Now let us ask the question, why is it that eye strain will cause nausea and vomiting? Also why will indigestion affect the eyes by causing “spools” in the vision? A little osteopathic logic, based as it always is or should be, upon anatomy and physiology, may throw some light on this subject. No doubt every one of us has demonstrated many times clinically that indigestion from overeating will cause soreness and contractures at the third and fourth dorsal, the nerve center in the spine for the stomach. The reflexes between the viscera and the eye are complex and difficult to follow. In giving the probable course of the nerve reflexes from the optic nerve to the third nerve Dr. Louisa Burns suggests the following: “The nerve elements of the retina start the impulse; it passes over that portion of the optic nerves which enter the anterior quadrigeminates, the cells of the quadrigeminates where the impulses are coordinated, then by axons of these cells to the lateral or viscero-motor nucleus of the third nerve, thence to the cells of the ciliary ganglion, and by the non-medulated (sympathetic) fibers of these, the short ciliary nerves to the non-striated muscles concerned, viz: the ciliary muscle, some fibers of the levator palpebral and the sphincter of the iris.” The third nerve arises in the floor of the aqueduct of Sylvius from two nuclei; a lateral nucleus which is a viscero-motor group of nerve cells, and a central nucleus or a somato-motor group of cells. The somato-motor nucleus supplies all the extrinsic muscles of the eye except the external rectus and superior oblique which are supplied by the sixth and fourth respectively. The nasal branch of the ophthalmic division of the 5th sends fibers to the ciliary muscle. Association fibers connect the nuclei of the 3rd, 4th, 6th and 7th. The evidence is in favor of the 10th or pneumogastric having such association fibers. We noted four places in the brain to which the optic tracts go before the radiations reached the center of sight in the occipital lobe. If we cannot follow all the reflexes through the brain and cord at least with the facts we have it is not difficult to imagine abnormal impulses coming over the third nerve from a straining of the ciliary nucleus, thence over viscero-motor fibers in the lateral horn of the cord, over the white ramicommunicantes, through the sympathetic ganglia, over the splanchnics to the stomach, producing abnormal peristalsis, nausea and vomiting. In turn we would have the somato-motor nerves to the muscles affected as before described, contraction and congestion of muscles of the spine.