202 OPHTHALMOLOGY FOR VETERINARIANS 



Hemostatics: 



The extracts of the suprarenal gland of the sheep. There are numerous 

 preparations of this in solution, such as adrenahn chlorid, adrin. 

 etc. They are used in operations to lessen hemorrhage. In opera- 

 tions on the hds they should be injected hypodermically. 



Ointments: 



Yellow oxid of mercury, i to 2 per cent. 



Red iodid of mercury, 3 of i per cent. 



Iodoform, 10 to 20 per cent. 



Aristol, 10 to 20 per cent. 



Oxid of zinc, U. S. P. 



Ichthyol, 5 to 20 per cent. 



The first four are used as indicated, in keratitis and ulcer of the 

 cornea. The two last are used in diseases of the skin about the 

 lids. Equal parts of vaselin and lanolin are used as a base. 



Powders: 

 Boric acid. 



Finely powdered iodoform. 

 Calomel. 

 The first two are often mixed in equal parts and used as a dusting- 

 powder following operations on the lids. They are of great value 

 in purulent ulcers of the cornea. 



Comhinations: 



When two or more of these medicines are indicated, they may be mixed, 

 if not incompatible; for instance, atropin or pilocarpin may be 

 mixed with an ointment or with a collyrium, etc. It is better to treat 

 each case according to its requirements and not have too many 

 "set" formulae. 



More accurate percentage solutions can be made by using the Metric 

 System. 



