86 OPHTHALMOLOGY FOR VETERINARIANS 



time its malignancy is marked and destructive processes 

 ensue. 



The treatment of all tumors is a complete excision of 

 all the tissue involved. The malignant types often re- 

 quire an enucleation of the eyeball, and in some cases 

 all the tissues in the orbit must be removed (exentera- 

 tion). 



Inflammation of the Nictitans Membrane.— This 

 occurs often in conjunction with conjunctivitis, though 

 it may occur without inflammation of adjacent struc- 

 tures. The membrane may be only slightly inflamed, 

 or it may become severely inflamed, swollen, and 

 edematous to such an extent as to completely cover the 

 cornea. It is usually due to traumatism. It often 

 becomes chronically hyper trophied, which greatly in- 

 terferes with its function and the closure of the lids, and 

 when the advancement is very great it covers the pupil- 

 lary area and shuts off vision. 



The excision of this body should be the last thing 

 resorted to. Keep the eye clean with antiseptic and 

 astringent washes and use antiseptic ointment for 

 lubrication. Be particular to examine the body care- 

 fully for foreign bodies which may be lodged within 

 its folds or beneath it. Hot appHcations every two or 

 three hours are beneficial, followed by astringent col- 

 leria. If, after diligent treatment, the body remains 

 hyper trophied, that portion externally may be excised, 

 being careful to leave that part of it that sweeps over the 



