270 THE STOCK OWNEk's ADVISEE. 



the face immediately below the eye. The results scarcely jus- 

 tify the operation, but some relief may be obtained by bleeding. 

 Belladonna extract is very iisefid in ophthalmia, or atropine may 

 be used instead. A solution of atropia sulphate, grains four; 

 aqua distilled, ounce one, may be used in the eye. 



The film that spreads over the anterior aspect of the eye con- 

 sists of an exudate which continues as long as the irritation lasts, 

 but afterwards gradually disappears by absorption. The deposit 

 is within the structures of the cornea and conjunctiva, and until 

 the inflammation has subsided all irritating applications are apt 

 to do harm. When it becomes necessary to remove the exudate, 

 and the inflammation has all subsided, nitrate of silver, grains 

 five, to aqua, one ounce, should be used to touch the parts. 



PERIODIC OPTHALMIA. 



This disease is not so frequent as it was fifty years ago. The 

 advancement of veterinary science has been the cause of its dis- 

 aj^pearing. It is a constitutional affection, terminating in an 

 opacity of the crvstalUne lens, termed cataract. 



Symptoms. — The attack generally comes on suddenly and in 

 the night. The eye is very weak, the upper lid droops, and the 

 eye seems smaller than its fellow; it is drawn into the orbit by 

 the retractor muscles. The eye retracts from the light. One 

 eye is generally affected at a time. There is a slight redness of 

 the conjunctiva, but not to the same extent as in simple opthal- 

 mia. The cornea is dim in appearance, with a well-marked ring 

 around it. The eye assumes a yellowish brown appearance. The 

 iris is always affected to a degree depending on the severity of in- 

 flammation. The subsidence of the attack is marked by a dimi- 

 nution of the inflammatory symptoms. The haziness slowdy dis- 

 appears from the cornea. The pupil becomes larger, less con- 

 tracted and rounder. The eye clears up, but is smaller than be- 

 fore the attack. The wrinkled appearance of the eyebrows after 

 the acute symptoms have passed off is characteristic of periodi- 

 pal opthalmia. The eye having gained more or less of its natural 



