Corneal Staphyloma. 387 



moved by the flow of tears, and the movement of the lids and 

 membrana nictitans. Trasbot reconimends dilute alcohol (5 : 100). 

 Moller advises chlorine water reduced to one-third the standard 

 strength, or boric acid solution (2 : 100). Bouley found good 

 results from a cocaine solution. Cadiot and Almy get the best 

 results from creolin (.5 to i : looc) 5 or 6 times a day, with 

 eserine. 



In all cases great relief can be obtained from a strong atropia 

 lotion (i : loo). Indolent cases may often be helped by warm 

 antiseptic compresses, which seem to stimulate the circulation 

 and nutrition of the part. The juice exuding from the scraped 

 fresh ca.s.sava and concentrated to a syrupy consistency, is strongl}' 

 antiseptic, and used with atropia or pilocarpin is the best agent 

 known for senile ulcer (Risley). 



In perforation use eserine, and antiseptic bandages and in case 

 of prolapsus iris, exci.se as already advised. 



CORNEAL STAPHYLOMA. 



Bulging corneal scar with adherent iris : from perforation, escape of 

 aqueous, intraocular pressure, vascularization of cornea. Diagnosis by cen- 

 tral cicatrix, vascularisation, pigmentation. Oblique illumination. Treat- 

 ment : iridectoni}', eserine. Suture. Enucleation. 



This is a bulging forward of a corneal scar with the iris ad- 

 herent to its internal surface. It may originate in perforation of 

 the cornea and escape of the aqueous humor, or in intraocular 

 pressure that advances the iris until it comes in contact with 

 the cornea, which becoming adherent and receiving an abnormallj'^ 

 large supply of blood or plasma, softens and bulges outward. It 

 may grow out to a great length in .some cases, Eck has seen it 

 two inches in the horse, and somewhat smaller in an ox. May 

 records a case affecting both eyes in the dog. 



Diagnosis is not usually difhcult. The scar in the mid.st of a 

 granulating projection of the cornea is nearly conclusive, but the 

 recognition of pigmentation of tlie growth and the adherent iris 

 often revealed by oblique illumination will nearly always show 

 the true nature of the case. 



