=Symptoms.=—The ophthalmoscope must be used in diagnosis. There is at first cloudiness of the retina; the outlines of the papilla become indistinct. We may note light patches of exudates. The vessels are more tortuous and often there are hemorrhagic spots. Opacities in the vitreous due to the exudate may be seen. Vision is disturbed in proportion to the inflammation. Weeks or months are required for recovery. Atrophy may set in and cause blindness. =Cause.=—Many general diseases are found back of this trouble, e. g. albuminuria, diabetes, leukemia, syphilis, gout and arteriosclerosis. Idiopathic cases occur with none of these diseases present, which gives a field for osteopathic research. =Treatment= should be directed against the general disease when present. For local effects treatment should be given to all the centers and localities that affect the trophism, nerve supply and circulation to the eye. Protect the eye by dark glass or confinement to a dark room and complete rest. Keep the bowels free and produce diaphoresis. Optic Neuritis This disease when manifest in the eye ball is called papillitis. If back of the bulb it is =retrobulbar neuritis=. =Symptoms of papillitis.=—Pupils are dilated and sight diminishes. The color of the papilla is altered to a white, reddish or gray and may show extravasation of blood. The papilla is swollen (choked disc), the arteries are thin and the veins are engorged. It takes months for the inflammation to clear. Atrophy is likely to occur. =Causes.=—Brain diseases are the most frequent cause, e. g. tumors. Syphilis, febrile diseases, nutritive disturbances, lead poisoning, heredity and growths in the orbit are cited as causes. =Symptoms of Retrobulbar Neuritis.=—There is little or no change in the papilla. The diagnosis must be made mostly from the way the vision is affected. The rule is a central scotoma in the field of vision. The first colors to disappear are red and green. In the acute form there is quick disturbance of vision. The eye looks normal outside and shows practically no change inside. =Cause.=—Toxemia, cold, influenza; nasal, nasopharyngeal and sinus disease (ethmoids), and infectious diseases are causes. Idiopathic inflammation of the optic nerve is noted by most oculists. Here the profound effects of spinal lesions upon the eye adds some important light. =Treatment of Papillitis and Retrobulbar Neuritis.=—In each individual case the treatment requires consideration of the causal factor. There may be required constitutional treatment in many cases. In others the cause may be found in the nose, nasopharynx, or spine. Effort should be made to remove the lesion in each case. Diaphoresis will aid in acute stages. Atrophy of the Optic Nerve