Table 3.

Grading criteria for clinical symptom and signs

	Grading criteria
Ocular pain	0: None—absence of pain
	1: Trace—slight sensation of pain or discomfort
	2: Mild—mild, tolerable aching of the eye
	3: Moderate—moderate and prolonged aching sufficient to require the use of analgesics
	4: Moderately severe—prolonged intense aching requiring the use of analgesics
	5: Severe—prolonged sharp ocular or periocular pain
Flare	Use a 1 mm wide beam of the slit lamp aimed at the center of the pupil
	0: None—no visible flare when compared with the normal eye
	1: Mild—flare visible against dark pupillary background but not visible against iris background
	2: Moderate—flare is visible with the slit lamp beam aimed onto the iris surface as well as the dark pupillary background
	3: Severe very dense flare. May also present as a “hazy” appearance of anterior segment structures when viewed with low power magnification of the slit lamp. Presents as a pronounced Tyndall effect
Cell	Use narrow slit beam (0.5 mm in width and at least 8 mm in length) at maximum luminance. Pigment and red blood cells are to be ignored.
	0: None
	1: 1 to 5 cells
	2: 6 to 15 cells
	3: 16 to 30 cells
	4: Greater than 30 cells