Table 1.

Artificial tears containing Carboxymethylcellulose (CMC) as a demulcent.

Active Ingredient(s)	Inactive Ingredients with Biological Activity	Brand
		With Preservative	Preservative Free
CMC 0.25%		Thera Tears® (Dequest)	Thera Tears®
CMC 0.25%	Trehalose	Thera Tears Extra® (Dequest)
CMC 0.5%		Refresh Tears® (Purite)	Refresh Plus®
CMC 0.5% Glycerin 0.9%	Erythritol L-Carnitine	Refresh Optive® (Purite)	Refresh Optive®
CMC 0.5% Glycerin 0.9%	Erythritol Sodium hyaluronate	Refresh Repair® (Purite)
CMC 0.5% Glycerin1% Polysorbate80 0.5%	Erythritol L-Carnitine Castor oil	Refresh Optive advanced® (Purite)	Refresh Optive advanced®
CMC 0.5% Glycerin 1% Polysorbate80 0.5%	Erythritol L-Carnitine Trehalose Castor oil Flaxseed oil		Refresh Optive Mega-3®
CMC 1%		Refresh Liquigel® (Purite),	Refresh Celluvisc®, Thera tears Liquigel®
CMC 1% Glycerin 0.9%	Erythritol L-Carnitine	Refresh Optive Gel® (Purite)