Table 1.

Groups

	Groups in corneal and conjunctival cell lines
1)	Benzalkonium chloride (BAK) + media (14.5%)
2)	Methyl paraben (MP) + media (14.5%)
3)	Sodium perborate (SP) + media (14.5%)
4)	Chlorobutanol (Cbl) + media (14.5%)
5)	Stabilized thimerosal (Thi) + media (14.5%)
6)	Disodium-ethylene diamine tetra-acetate (EDTA) + media (14.5%)
7)	Media (100%: total viable control)
8)	Formalin + media (14.5%: dead control)

Experimental testing solutions used in tissue culture with immortalized human corneal (HCE: 10.014 pRSV-T) and conjunctival (CCC: Wong–Kilbourne derivative of conjunctiva) epithelial cells.