DISEASES OF THE CORNEA 99 



first suture and the upper and lower inner angles of the 

 wound, avoiding the deep structures. This operation 

 is known as canthoplasty. 



The red iodid of mercury ointment, i grain to the 

 ounce, with a i per cent, solution of atropin, appHed 

 three times a day, is of great value, together with general 

 cleanliness and the treatment of the lids. 



If much opacity of the cornea remain, treatment as 

 described under that head may be employed. 



Phlyctenular Keratitis.— This is a vascular disease, 

 and may appear on any portion of the corneal surface, 

 but is more often seen at the limbus and associated 

 with phlyctenular conjunctivitis, under which head it is 

 described. 



Herpes Comeae. — This is a form of vesicular keratitis. 

 It usually occurs in conjunction with herpes on other 

 portions of the body or face, such as the lips, nose, 

 forehead, and eyelids, more especially when these 

 eruptions accompany or follow febrile diseases of the 

 respiratory tract, such as influenza, pneumonia, bronchi- 

 tis, etc. It is characterized by a vesicle— one or several— 

 which is at first clear, but soon becomes cloudy or yel- 

 lowish in color, eventually breaks down, and forms a cor- 

 neal ulcer. Much pain and irritation attend it. The 

 prognosis is good if carefully treated, but if neglected 

 destruction of the cornea may occur by widespread 

 ulceration. The treatment is principally symptomatic. 



Herpes zoster also attacks the cornea. It is much 



