INJURIES OF THE GLOBE 169 



to magnetic attraction, the electromagnet is the instru- 

 ment to use. It is made in two forms— the large or 

 giant magnet, which has a lifting power of 400 pounds 

 or more, and the hand magnet, which is sufficient in 

 most cases. 



In making the scleral incision the eye should be drawn 

 in the opposite direction, by an assistant, with a strong 

 fixation forceps. Plunge the Graefe knife into the eye 

 with the edge of the blade backward, and enlarge the 

 opening in the act of withdrawing the knife. The in- 

 cision should be made far enough back to prevent 

 wounding the lens or cihary body, and in a position as 

 near the foreign body as possible. The magnet point 

 is now introduced into the wound and the current 

 turned on. The body will usually come in contact with 

 the point, when it can be withdrawn. Authors gener- 

 ally recommend making the scleral incision at a point 

 between the insertion of the muscles, but the writer has 

 made the incision through the belly of the internal 

 rectus muscle in one case, and was successful in remov- 

 ing steel from the vitreous without the loss of a particle 

 of vitreous or injury to the cihary body or lens. Such 

 an incision must be made parallel to the muscle-fibers, 

 which close and protect the scleral wound. 



When the body is embedded in the chorioid it may 

 become encysted, and, if sterile, may do no particular 

 harm, though it may be dislodged, drop into the vitreous, 

 and cause irritation and inflammation. If lodged in the 



