370 DISEASES OF THE EYES. 



DISEASES OP THE SCLEROTIC MEMBRANE, OF 



THE NERVOUS PORTION OP THE EYE, AND 



ALSO THE VITREOUS HUMOR OP THE 



POSTERIOR CHAMBER. 



These diseases are generally not of any great importance com- 

 pared with the diseases before described, and therefore we will not 

 go into minute details. 



(1) Inflammation of the Iris {IrUis). This affection is very rare 

 in the dog (Moller). It may be recognized by contraction and 

 difficulty of movement of the iris, change in the color of the iris, 

 fibrous accumulations in the shape of a gray veil-like coating, and 

 dalness of the fluid of the anterior chamber, and slight dimness 

 of the cornea. The cure for this disease consists in complete rest, 

 keeping the animal in a dark place, and solutions of cocaine and 

 atropine. 



(2) Purulent Inflammation of the Eye {Panophthalmitis). 

 This is produced by serious concussion of the eye itself. It may 

 also be due to septic wounds of the cornea and sclerotic mem- 

 brane, as well as to Ihe large perforating ulcers of the cornea. 

 We recognize the following acute symptoms: 



The eyelids are constantly closed ; great redness of the con- 

 junctiva; total opacity of the cornea; purulent accumulations in the 

 anterior chamber of the eye; myosis; great hardness and enlarge- 

 ment of the bulbus. After a short lime we may have perforation 

 through the cornea, and, in rare cases, through the sclerotic mem- 

 brane. The lens and vitreous humor are ejected through the 

 opening with the purulent mass; the eyeball collapses, becomes 

 contracted, and forms a knob-shaped mass in the eye; the lids com- 

 pletely collapse and form a hollow in the face. The only thing 

 to do in such a case is to perform enucleation, or removal of the 

 eye. 



Enudeatlon. Removal of the eyeball should be performed under a narcotic 

 or ether. We pull out the eyeball by means of a tenaculum, cut through the 

 conjunctiva with a pair of small, pointed scissors closely behind the cornea, 

 snipping the scissors around the eye, keeping as close to the bulb of the 

 eye as possible, and by this means separate the muscles and cut through 

 the optic nerve. The author thinks it is advisable to remove the membrana 

 nictitans at the same time (Fig. 82). 



