PROI.APSE OF THE IRIS. 



This has been already referred to as a complication of perfor- 

 ating ulcer or wound of the cornea. If it cannot be returned and 

 maintained by a compression bandage and eserine, the only resort 

 is to draw out the prolapsing portion and cut it off with scissors, 

 the eye and instruments having been rendered thoroughly aseptic. 



INTERNAL OPHTHALMIA. 



Diagnosis of internal ophthalmias difficult. Causes : as in conjunctivitis, 

 extension of conjunctivitis or keratitis to iris, choroid, ciliary circle, retina ; 

 Lymphatic constitution, damp soil, air and stable, pit life, dentition, grain 

 feeding, training. Symptoms : ophthalmic symptoms generally, enlarged 

 ciliary vessels in sclera not movable ; white zone around corneal margin ; 

 iris dull, brownish, sluggish ; intraocular tension increased : flocculi in 

 aqueous humor : photophobia : oblique focal illumination ; sudden change 

 from darkness to light : synechia : ophthalmoscope. Cyclitis. Diagnosis : 

 from keratitis, recurrent ophthalmia. Lesions : according to chief seat of 

 the disease : inflammation of Descemet's .membrane, iris, choroid, ciliary 

 circle, lens, vitreous and retina in variable degree. Opacity of aqueous,' 

 lens, capsules, or .vitreous. Prognosis : always grave, often vision impaired 

 or lost. Treatment : rest, pure air apart from strong sunshine, removal of 

 causes, local bleeding or cupping, derivation, purgative, cooling diuretics : 

 locally astringent antiseptic lotions, cocaine, homatropine, blister, undue 

 tension antiseptic puncture, mercury oxide ointment ; in rheumatic cases 

 salicin or sodium salicylate. 



In the domestic animals it is not always possible to distinguish 

 between inflammations affecting different portions of the inner 

 and middle coats of the eye (iritis, cyclitis, choroiditis, retinitis), 

 so that it is. convenient to give in general terms the phenomena 

 and treatment of the class known as ophthalmia internus. This 

 is all the more appropriate that inflammation of one of these 

 divisions so frequently extends to the others producing panoph- 

 thalmitis, that the disease in one usually implies an early impli- 

 cation of all. 

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