Most writers describe a regular series of disorders associated with the eye of the dog. I must be permitted to recite only those which I have witnessed; and surely, if the diseases which the writers alluded to above have mentioned do exist, I must have encountered some solitary instance of each of them; instead of which, I have been honored by the confidence of all classes, and have after all to confess I have not witnessed a specimen of genuine ophthalmia in this animal.

Cataract.—This derangement of the visual organ is very common with the dog. Every old animal that has lost his eyesight is nearly certain to be blind from cataract. The optic nerve appears to have retained its health long after the crystalline lens has parted with its transparency. The latter becomes opaque, while circumstances allow us to infer the former is yet in vigor; for certainly dogs do see through lenses, the milky or chalky aspect of which would justify us in pronouncing the sight quite gone. There is no precise time when cataract makes its appearance. It may come on at any period or at any age. It may be rapid or slow in its formation; but from its generally known habit, we should be inclined to say it was rather slow than otherwise; though upon this point the author can speak with no certainty. No breed appears to be specially liable to it, but all seem to be exposed to it alike. The small-bred, house-kept, high-fed dogs, however, are those most subject to be attacked by it; for, in these kinds of animals, on account of the derangement of the digestive organs, the eyes seem to be disposed to show cataract earlier than in the more robust creatures of the same breed.

The cause of this affection is, in the horse, usually put down to blows; but, in the dog, we dare not say the disorder is thus produced. The dog is more exposed to the kicks and cuffs of domestics than is the horse; the violence done upon the first-named animal being less thought about, and therefore less likely to be observed. But that the disease takes its origin in any such inhumanity the author has no proof, and no intention of insinuating an accusation against a class, who being generally ignorant, have therefore the less chance of a reply.

The disease seems to be the natural termination of the animal's eyesight; and, though the author has seen the iris ragged-looking, as though acute ophthalmia had loosed its ravages upon the delicate structures of the eye, nevertheless he has in vain endeavored to detect the presence of that disease.

Were ophthalmia common enough to have produced one-half of the cataracts which are to be witnessed by him who administers to the affections of the canine species, surely I must have met with it; as not being a very brief disorder, but one which by its symptoms is sure to make itself known, I must have encountered it in one of its numerous stages. However, not having seen it, and still being anxious of tracing cataract to its source, the author has been induced to attribute it to the influences of old age, high breeding, or too stimulating a diet.

Medicine having appeared to do injury rather than to produce benefit, the author has generally abandoned it in these cases; whereas those measures which are within the reach of every proprietor, such as change of abode, attention to necessary cleanliness without caudling in the bed, wholesome food, and a total abstinence from flesh, added to the daily use of the cold bath with a long run, and constant employment of a penetrative hair-brush to the skin afterwards, have seemed to stay the ravages of the disorder; and on these, therefore, the author is inclined to place his entire dependence.

Gutta Serena.—The author has seen one or two cases of this affection. One was present with disease of the brain, to the increase of which it was clearly traceable. The other was attributable to no known cause; but as blows on the head are beyond all doubt ascertained to produce this affliction, the author in his own mind has no doubt of its origin. A temporary affection of this nature is also constantly witnessed when the dog falls down in a fit, or rather faints from weakness; as when a female is rearing an undue number of pups, or when a dog has been too largely bled, or retained too long in the warm bath.

In the last cases, the gutta serena departs as the animal recovers; but in the first-named, sometimes it is constant, and no medicine appears to affect it for good or for evil. The author, therefore, does nothing in such cases beyond giving general directions, as in the instance of cataract.

Gutta serena is known by the organ being perfectly clear, but the iris remaining permanently fixed. The introduction of sudden light produces no effect on it; neither, unless the current of air be agitated, does the eyelid move. Towards the latter stage the eye changes color; but when it first occurs, a person without experience would prefer the eye in this state, because it looks so thoroughly bright and transparent. The aspect of these eyes is known to those who are much among animals, and the carriage of the body is recognised as altered when a creature becomes blind; besides which, trust him alone, and his running against different obstacles, as well as his manner of walking, will declare the truth.

Simple Ophthalmia.—To this disorder of the eye the dog is very susceptible. It may be caused by dust, dirt, thorns, or portions of leaves getting into the eyes; the symptoms are, constant closing of the lid, and perpetual flowing of the tears. Though the eye be closed, the lid is never quiet; but is being, during the entire period, spasmodically, though partially, raised to be shut again, or in perpetual movement. If the lids are forced asunder, the conjunctiva or mucous membrane forming the inner lining of the lid is seen to be inflamed; while the same membrane covering the ball of the eye is perceived to be of a white color, and perfectly opaque.

The cure in this instance is always, first, to remove the cause of the injury, and then to apply some of the remedies in the manner mentioned hereafter.

The conjunctiva in the dog is very sympathetic with the mucous membrane lining the stomach. The interior of the stomach may be inflamed, and the eye sometimes exhibits no sign of sympathy; but more often, as in distemper or rabies, it will denote the existence of some serious disorder. So if the animal's digestive powers are weakened by an undue quantity of purgative medicine, the eyes will assume all the symptoms of distemper, even to the circular ulcer in the centre of the organ. However, in instances of this kind nothing need be done for cure; the major disorder being subdued, the minor one subsides.

No matter how virulent the disease of the eye may appear to be—even though it should become perfectly opaque—let it alone: any meddling does injury. No bathing or medicaments can hasten the cure. Although it should ulcerate in the centre, and the terrible appearance of the eye be seconded by the entreaties of the proprietor, still I caution you to continue quite passive. Touch the ulcer with nitrate of silver, as is the common practice, and the eye will most likely burst. The aqueous humor will escape, and a large bunch of fungus will start up in the place of the ulcer occupied. This fungus, if let alone, may fade away as the stomach returns to health; but a white spot is established in its place to remind you of your officiousness.

Nevertheless, simple ophthalmia occasionally will appear when nothing can be detected to affect the stomach; probably owing to large dogs chasing through brush-wood, or those of the smaller breeds hunting through long grass. Then a square of soft lint, formed by doubling a large piece several times, is laid upon the painful organ, and kept wet with the following lotion:—

The first symptoms having subsided—that is, the dog being capable of raising the lid, and the flow of tears having in some measure stopped—the previous lotion may be changed for the following wash:—

The proper manner of applying these preparations to the eye deserves notice. Let the owner buy a large-sized, long-haired, camel's-hair painting brush; pour a little of the liquid into a saucer; saturate the brush in the fluid; pull the lids gently asunder, being careful not to call forth resistance by frightening a timid animal with any exhibition of haste or violence; then, having the eye exposed, draw the brush quickly across it, and the business is over.

The author is frequently consulted by ladies, because their favorites' eyes run water. Such is a consequence of high breeding in some of the canine species; and being so, medicines of various kinds, by drying up the secretion of the lachrymal gland, may at first appear to do good, but must ultimately be fruitful of the most serious injury.

Ejection of the Eye.—The eye of the dog is rather curiously situated, which, as the writer knows of no author who has remarked on its position, he may as well refer to in this place. The eye of man is situated within a bony orbit, from which it cannot in the course of nature protrude. The eye of the dog, also, has an orbit partly formed of bone; but as regards the ridge, which in man supports and gives prominence to the eyebrow, in the dog it is composed of ligament, as with animals of the cat, pig, and other species. The reason of this arrangement—the cause for composing part of the orbit of ligament—is to allow the eye to protrude or to take its place without and before the orbit. This position of the eye is easily perceived, when a live specimen which has confidence in man is examined upon the knee, and at the same time the skull is inspected. The cause of this peculiar situation of so important an organ, is to allow the eye to possess telescopic properties; because the dog has the faculty of withdrawing the eye within, or rather quite to the back of the orbit; as any who have beheld the animal in some stages of brain disease, or the last stage of distemper, must, with their attention directed to the fact, be convinced. The dog in its wild state lives by the chase, and therefore has Providence endowed his visual organ with peculiarities which best enable it to discover its prey; at the same time, also, affording extra scope of vision, or power of seeing around it, to the eye of the animal.

Owing to this peculiarity, the eye in consequence of a bite may be forced out upon the cheek; or, as once happened in my own experience, the use of tapes for the purpose of giving medicine may be the cause of the injury. Whenever this happens, procure a glass of clean milk-warm water, and a piece of soft lint; then wash the eye; when obtain a soft napkin; let the eye be well greased with any mild and perfectly sweet ointment; wrap the napkin about the right hand, and with the fingers thus encased, gently take hold of the ejected ball of the eye, while the fingers of the left hand are employed in raising the lid of the emptied orbit; then applying gentle but adequate force, and at the same time giving to the wrist of the right hand a rotatory motion, the eye will at once assume its proper place. The use of the eye lotion and wash will perform all that the after symptoms may require.

Dogs are often brought to us because the animal has been taking liberties with the cat; which mistress puss has turned to resent, and her paw—the claws in the moment of irritation being out—has unfortunately scratched the dog's eye. When consulted on such a subject, the eye lotion No. 1 is in most instances all that is required; for the coverings of the eye are endowed with great powers of self-reparation. If, however, the application recommended does not perform everything to the proprietor's satisfaction, the eye wash No. 2 will perfect the cure. Accidents of this description are apt to leave scars in the shape of white marks across the eye, which time must be allowed to remove; and this in general is performed, while all the appliances of art in the writer's hand have been useless for hastening this object.