528 DISEASHS OJ- THE EYE 



Silver nitrate, i to j per rent. 



Protargol, lo to 25 per cent. Ii has a feeble action. 

 The actual cautery for corneal ulcers, conical cornea and 

 epithelioma of flie lid. 



(5) Mydriatics and Cyclople^ics. 



These are to tlilaie the |)upil and paralyse the accommodation. 

 Indications. 



To dilate the jiupil for ophth.ilmic examination. 



To prevent adhesion in iritis. 



I'or central ulcer of the cornea. 



To j)arahse the accoinmodation in order to estimate the 

 refraction. 



For lamellar and nuclear cataract. 



After some operations. 



In certain diseases of the cornea and deeper structures. 

 Remedies. 



Atropine in solution or oininieiu, i j)er cent. The effect 

 lasts for a week or more. It may jirecipitate an attack of 

 glaucoma in a predisposed eye. Some patients are sus- 

 ceptible to its use and show toxic symptoms. Give 

 morphine as an antidote. 



Homatropine hydrobromate is milder and almost as useful. 

 The effect lasts one day onl} or a little more. Use 2 per 

 cent. soluiit)n, one drop every five minutes for three to 

 four doses. 



Kuphthalmin for examination purjxjses. 5 to 10 per cent, 

 solution ; two drops onlx . The effect passes off in a few 

 hours. 



Cocaine hydrochlorate, one or iwo chops of a 4 per cent, 

 solution. The effect passes off in about one hour. It 

 will usually diminish intraocular tension. 



(6) Myotics. 



To contract the pupil and diminish intraocular tension. 

 Useful in cflaucoma and f>eriplieral corneal ulcers, 

 lilserine salicylate J to .] per cent. It may cause irritation. 

 I'ilocarpine nitrate (muriate) I to i per cent, is milder. 



l\ Eserine sulph. 1-| yrain 



Cocaine miir. ... ... 2 ,, 



Ac|ii;e destill. ad ... ... i ounce 



(7) Anaesthetics. 



General. Chloroform for children; ether for adults if possible. 

 Cocaine hydrochlorate, 2 to 4 per cent. It a.ssists the action 

 of mydriatics and miotics, (^ne drop is sufficient for the 

 removal of a foreign body. 



