Table 5. Modified Draize’s Grading Scale for Evaluating the Ocular Irritation Potential of Substances.

irritation appearance	irritation intensity	score
conjunctival discharge	normal	0
	slight discharge	1
	sever discharge covering a small area around the cornea	2
	sever discharge covering a large around the cornea	3
conjunctival chemosis	normal	0
	slight chemosis including the nictitating membrane	1
	severe chemosis with the eye partially closed	2
	severe chemosis with the eye closed	3
conjunctival redness	blood vessel normal	0
	some blood vessel definitely hyperemic	1
	diffuse color, individual vessel not easily discernible	2
	diffuse beefy red	3