In some cases the anterior chamber is invaded by pus (hypopyon).
(iv) For hypopyon ulcer associated with lachrymal obstruction.
It usually comes on about the third day and may be accompanied by hypopyon.
(iii) To evacuate the anterior chamber in bad corneal ulceration, especially when associated with hypopyon and tension.
hypopyon hy·po·py·on (hī-pō'pē-ŏn')
The presence of pus or a puslike fluid in the anterior chamber of the eye.