406 DISEASES OF THE EYES 



by surgical means (see i)age 401). This operation invarialjly removes 

 the irritation. 



In ophthalmic blennorrhoea we must endeavor to prevent it before 

 it goes too far, particuhuiy if it appears as an epizootic. We must treat 

 it with antiseptic agents, and it is especially important to keep the con- 

 junctiva clean with water or some non-irritating antiseptic fluid, such 

 as boric acid, 3 per cent.; corrosive sublimate, 0.02 per cent.; perman- 

 ganate of potassium, 0.05 per cent.; creolin, 1 per cent.; salicylic acid, 

 1 per cent.; carbo-sapo-cresol or lysol, 1 to 100. These must be intro- 

 duced under the lid l)y means of a syringe, brush, or sponge. "When it is 

 necessary we must irrigate the eye with strong solutions of nitrate of 

 silver (1 to 3 per cent.) , taking care to observe the rules already mentioned, 

 that is, neutralizing the silver solution b}" means of salt solution. A 

 solution of itrol 1 to 4000 has been found very useful in these cases. 

 Covering the conjunctiva with calomel, dermatol, tannoform, is also 

 useful. This is applied by means of an insufflator or blown through a 

 cylinder of paper or a c{uill. Aniline (pyoktanin), advised by some 

 authors, is of little benefit. 



The treatment may also be materially altered ])y complications of 

 the cornea, for which we would refer to Keratitis for further details. 



Neoformations on the Conjunctiva. 



Beside the inflammatory condition which has just been described, 

 we may have tumors, fibromas, papillomas and lipomas of the conjunc- 

 tiva, but, as a rule, these occur on the membrana nictitans. Thej^ are 

 generally painless, sometimes extending over the eye and preventing the 

 closure of the eyelids. A peculiar case of hair formation has been 

 observed by the writer, situated in the conjunctiva of the upper lid, in 

 which a tuft of long, white, silk-like hair grew out of it, and a few isolated 

 hairs in the vicinity of the spot. On examination the hair spot was found 

 to contain hair Indbs, sel)aceous and sudoriferous glands. It was found 

 that several animals of the same strain in that breed had similar anomalies. 



DISEASES OF THE CORNEA. 



Inflammation of the Cornea. 



(Kcratiiis). 



Notwithstanding the fact that the corneal coat does not contain 

 any blood vessels, it is frequently the seat of inflammatory processes 

 which become present through a pericorneal injection due to intense 

 irritation of the blood vessels which surround the border of the cornea, 

 and further by an opacity of the cornea forming an obstruction that 

 prevents the admission of rays of light into the eye itself. This clouding 

 or opacity may extend over the entire cornea, or it may only involve a 



