522 



CYCLOPEDIA OF LIVE STOCK AND COMPLETE STOCK DOCTOR. 



IV. Glaucoma. 



This is inflammation involving the whole globe of the eye, but more par- 

 ticularly the vitreous humor, (the fluid in the posterior chamber of the 

 eye,) the iris, choroid, and sometime the retina. It occasions a dilated, 

 irregular pupil, muddiness of the vitreous humor, and a sea-green color 

 of the interior of the eye, with blindness as a frequent sequel. 



What to do. — It is treated by constitutional remedies — calabar bean, 

 electricity, etc., and also by iridectomy (an operation to excise a portion 

 of the iris, to relieve the intro-ocular pressure.) These measures all 

 require the skill of a veterinarian. 



V. Iritis. 



Inflammation of the iris (that portion of the eye forming the pupiJ 

 and giving the color to the eye) is called iritis. 



Cause. — Severe external violence, extremes of light and darkness, ex 

 posure to severe storms, facing the wind, and constitutional disorders. 



How to know it. — A pink ring is seen around the sclerotica (the white, 

 fibrous coat forming the large posterior portion of the eye) ; the eye is re- 

 tracted and partly closed ; the haw is drawn up ; the conjunctiva is inflam- 

 ed, there being considerable fever in the con- 

 stitution ; the pupil is very small, and the 

 aqueous humor beconies turbid, with white 

 flakes floating in the anterior chamber, and 

 usually a little pus in the bottom of the latter^ 

 What to do. — Place the animal in a dark 

 stall, or cover his face with a green cloth. Give 

 a purgative, No. 23. Bathe the eye with warm 

 water as much as possible, and apply No. 80 

 every few minutes for half an hour ; then rest 

 four or five hours, and repeat it. So continue 

 from day to day, till all symptoms of inflam- 

 mation are gone. Let the feed be soft and un- 

 stimulatimg. 



VI. Leucoma. 



This is a white opacity of the cornea, from extravasation of lymph into 

 the fibres of the extension of the conjunctiva over the cornea. It may be 

 the result of other eye diseases, of fever in the system, or of external vio- 

 lence. It is best treated by keeping in a dark place, with laxative food 

 and continuous application of No. 82, till it is cleared up. 



MANNER OF SHADING A 

 HORSE'S EYES WHEN SUF- 

 FER'NG FROM INFLAMMA- 

 TION. 



