RECURRENT OPHTHALMIA OF vSOLIPEDS. PERIODIC 

 OPHTHALMIA. MOONBLINDNEvSS. 



Definition. Causes : wet impermeable soil, clay, river bottoms, deep 

 valleys, inundations, enclosing forests, damp air, lack of sunshine, rank 

 fodders, wet seasons, damp, cold, basement stables, heating constipating 

 fodder (corn, buckwheat, wheat), dentition, training, age of domestication, 

 sale, etc., spring, shedding coat, heredity, debilit}', ill health, worms, de- 

 bilitating infectious diseases, over work, insufficient, indigestible food, 

 local irritants. Microbes. Rheumatism. Parasitism. Symptoms : fever 

 variable, lack of vigor, sudden attack, irritation, photophobia, lachrj'nia- 

 tion, closed lids, contracted pupils, retracted eye, redness, swelling of lids, 

 conjunctiva, haw, sclera, slight corneal opacity, with vascularity, aqueous 

 turbid, flocculent, iris of dull color, sluggish, pupil contracted, hypopion, 

 posterior chamber yellowish green, intraocular tension, crisis seventh to 

 tenth day, convalescence fifteenth day. Recurrence. Obscurity of vision. 

 Eye between attack : blue zone around cornea, eye seems smallei, retracted, 

 prominent haw, angle in upper lid, dull iris, tint lighter, contracted pupil, 

 cataract, alert ears. Lesions : exudates back of cornea, narrowed anterior 

 chamber, sizy aqueous, thickened iris, adhesions of lens capsule, or iris, 

 torn iris, lens opaque, fibroid, calcareous, atrophied, black cataract, vit- 

 reous opaque, yellow, black, shrunken, choroid uneven, discolored, de- 

 tached, retina with exudate, detached, posterior chamber contracted. 

 Prevention : drainage, mature horses for damp lands, liming soil, get fod- 

 der from dry locality, don't breed in cloudy regions, good diet and regimen, 

 avoid corn, wheat and buckwheat, Glauber salts, pure dry stable, exclude 

 debilitating diseases and parasites, keep in hard nuiscular condition, change 

 to dry locality, don't breed from blind stock, legislation. Treatment : re- 

 move causes, cure rheumatism or other morbid factor, darkness, antiphlo- 

 gistics, laxative, diuretic, local bleeding, cupping, blister, seton, locally 

 atropine, cocaine, pyoktannin, sublimate, lead, puncture, tonics, treat cor- 

 neal opacities. Jurisprudence : return a newly bought horse in 3b days, 

 (France) or more : extend the time if suspected. 



Defi)iition. This is an iuflainnialory affection of the interior of 

 the eye, intimately related to certain con.stitiitions, soils, climates, 

 and .systems of management, showing a strong tendenc}- to recur 

 again and again, and usually ending in blindness from cataract 

 or other destructive lesion. 



Cajises. A wet, impermeable, swampy or undrained soil 

 is a potent cause of this disease. Heavy claj's, which absorb and 

 retain moisture, river bottoms and deltas which are frequently 

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