Table 1. Identification of commercially available tear substitutes.

Identification code	Active ingredient	Preservation system
Etacortilen®	DEXAMETHASONE 0.15%	UNPRESERVED
Hyalistil®	SODIUM HYALURONATE 0.2%	THIOMERSAL
Xiloial®	SODIUM HYALURONATE 0.2% TS-Polisaccaride 0.2%	UNPRESERVED
TSP 0,5%®	TS-Polisaccaride 0,5%	UNPRESERVED
Optive®	CARBOSSIMETHYLCELLULOSE 0.5% Glycerin 0.9%	PURITE®