. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . can be more conveniently reached inthat way, an incision may be made through the sclera close to its situa-tion. If possible, the tip should be brought into contact which thebit of steel that it is to remove, and in the withdrawal of the magnetit will come with it. If possible it is well to draw out with it the injuredand infected tissue, which should be excised. It is important that theincision be large enough to prevent scraping off of the foreign body fromthe tip as it is withdrawn. 33G DISEASES
. Electricity : its medical and surgical applications, including radiotherapy and phototherapy . can be more conveniently reached inthat way, an incision may be made through the sclera close to its situa-tion. If possible, the tip should be brought into contact which thebit of steel that it is to remove, and in the withdrawal of the magnetit will come with it. If possible it is well to draw out with it the injuredand infected tissue, which should be excised. It is important that theincision be large enough to prevent scraping off of the foreign body fromthe tip as it is withdrawn. 33G DISEASES OF THE EYE The Giant or Haab magnet (Fig. 288), is a stationary instrumentof great power, designed to withdraw the steel without being broughtinto contact with it. When recent, the wound of entrance may beenlarged and the pole of the magnet brought near to it; the current isthen turned on, when the fragment will come from the eye and adhereto it Another method is to draw the piece of steel to one side of thelens, against the iris, which it will cause to bulge; then, by changing the Fig. 288. Haabs magnet. direction of the eye, it may be drawn through the pupil into the an-terior chamber, from which it can be extracted through a corneal incisioneither with a smaller magnet or forceps. All of these operations shouldbe done aseptically. Vascular Tumors and Angiomata of the Orbit.—P]lectrolysis, exceptingin very large and rapidly increasing growths, which should be excisedwhen possible, gives us probably the best method of treating these DISEASES OF THE EYE 337 tumors, as it possesses the advantage of safety and leaves no of two methods may be used: First, one needle (the kathode) maybe introduced, the other pole (a flat electrode) being placed either onthe temple or some other indifferent point; second, the bipolar method,in which two needles are introduced, one connected with the kathode,the other with the anode. Unless the tumor is small, the latter methodis prefe
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