STAPnYLOMA. 547 



a needle and thread, and have cut it out ^^ith a scalpel ; but 

 should there be any difficulty in doing this, the nitrate of silver 

 or caustic potash may be applied with freedom. The escliar of 

 ■one cauterisation should be allowed to fall off, and the effects to 

 subside, before the application of the caustic is repeated. 



The staphyloma due to dropsy of the eye admits of but one 

 remedy, and that may prove to be only palliative. The cornea 

 13 to be punctured, to allow the escape of the contained fluids. 

 If this operation is not performed, the cornea will in time be 

 absorbed ; the contents of the eyeball will then escape, and the 

 eye itself become entirely destroyed. This form of stapliyloma 

 is generally met with in pet dogs, especially the King Giailes 

 spaniel, and is a source of great grief to their lady owners. 

 After the operation of puncturing the eyeball, purgatives and 

 " short commons " are to be prescribed. 



Ulcers on the cornea are best treated with the nitrate of 

 silver, either in solution or in its solid form. If there is con- 

 stitutional disease or debility, the general system must ho 

 attended to. 



DISEASES OP THE nUSIOURS OP THE EYE. 



Very severe injuries to the eye may cause the character of 

 the aqueous humour to be entirely clianged. Instead of being 

 a clear, colourless liquid, it becomes reddened with extrava- 

 sated blood, milky- white by effusion of seruiu, or replaced by a 

 solid fibrinous mass, which, after undergoing various transforma- 

 tions in colour, from bluish-white, amber, or brown, is finally 

 converted into a pearly-white material, partially or wholly filling 

 up the anterior chamber, causing total blindness of the eye, 

 affected, or interfering with vision to a very great extent. 



GLAUCOMA, 



A disease in which the vitreous humour loses its trarisparency, 

 and assumes a blue colour. It is a very uncommon disease, 

 and is usually associated with cataract or with amaurosis. It 

 Las been said that in glaucoma the hyaloid membrane covering 

 the vitreous humour is absorbed, and that the humour is in an 

 xmconfined fluid- condition. In some disocctions that I have, 



