34 



ness is better (more safe) than partial blindness; hence, 

 large and dense opacities are preferable to weak and diffuse 

 opacities, unless the latter can be removed. Scar tissue, 

 from ulcers, wounds or abscesses, can not be removed in the 

 horse; it may in some instances disappear in the ox, but in 

 the dog, it is, as a rule, entirely removed. Chalk spots, 

 streaks or stripes, as a rule, are permanent — not amenable 

 to treatment. Weak and superficial opacities may be im- 

 proved and many times can be removed by judicious treat- 

 ment. 



The following ointment may be employed : Yellow oxide 

 of mercury, 4 grains; atropine, 1 grain; vaseline 4 drachms. 

 Put a small quantity under the eye lid; then with fingers 

 on the outer surface of the lids work or move them around 

 over the cornea in radial and circular directions. Finely 

 pulverized calomel may be thrown into the eye by placing a 

 small quantity in a quill and blowing it into the eye. This 

 should not be repeated oftener than once per week. In case 

 the horse will not permit the blowing of the calomel into 

 the eye, it may be used in the form of a salve, by mixing it 

 with vaseline. A salve of potassum iodide 10 grains and 

 vaseline 1 ounce may be employed. Some authorities re- 

 commend massage treatment — placing two fingers upon the 

 upper eye lid and with slight pressure moving it in a circular 

 direction over the opacity. This massage treatment may be 

 repeated daily unless signs of inflammation should appear. 



STAPHYLOMA OF THE COKNEA. 



The bulging forward and outward of the cornea is desig- 

 nated staphyloma. It may be partial or complete, depend- 

 ing upon whether a part or all of the cornea is involved. 

 Thinning of the cornea by ulceration and eruption of large 

 abscesses, so reduce the resisting power of the cornea that 

 the intra ocular pressure (pressure of the aqueous humor, 

 etc.) distends, projects or pushes the cornea outward. The 



