In consequence of injuries to the eye, blows, contusions, etc., or as a consequence of severe and repeated inflammation, the crystalline lens becomes opaque so as to interfere with or altogether destroy the sight. On examining the eye, deep in the pupil, a whitish, yellowish, or brownish body is discoverable. Sometimes, especially in the commencement, white streaks run from the center outward, or the whole chamber within the pupil looks dim and whitish. Old Cataracts are incurable, but recent and forming cases may be benefited by giving A.A. and B.B., a dose of fifteen drops, every night, alternately. Ophthalmia, Inflammation of the Eye There are in the horse two well marked forms of sore or inflamed eyes. ACUTE OPHTHALMIA and PERIODIC or MOON BLINDNESS. Acute inflammation occurs usually in consequence of some irritating substance, hay seed, dust, etc., having got into the eye, or from overheating, heated foot, or from hereditary predisposition. SYMPTOMS.—It comes on with heat and uneasiness, the animal keeps the eye closed, or dreads the light, the eye-ball and inside of the lid look red, and the ball is protruded and the eye secretes a quantity of water, which runs down on the cheek, or of humor, which becomes purulent, and glues the lids together. The cornea is dim and whitish, or covered with a scum, the haw is swollen and red. TREATMENT.—Examine the eye for dirt, hay seed, hair, or other substances, and if found, carefully remove them. They are more frequently under the upper lid, which may be turned inside out over the point of the finger, by taking the lashes between the finger and thumb, and turning the lid upward. The eyes should be bathed with HUMPHREYS’ MARVEL WITCH HAZEL, diluted one-half with water, or if this be not at hand, make a lotion by putting four or five drops of A.A., in a half-pint of pure, soft water, and the eye should be bathed with this two or three times per day, so long as the heat and swelling exist. Give at the same time, in recent cases, fifteen drops of A.A., four times per day, and in old cases the same dose morning and night. Arnica is of little consequence, except where the inflammation is the result of a bruise. PERIODIC OPHTHALMIA is really a general affection, the result of teething, and usually appears on the cutting of the middle incisors, the molars, and tusks, and hence, at the age of from three to five years.