There seems to be about 5 or 6 different ingredients (components) to the whole mess of dry eye drop products. So, some products made by the same company just rename their product even tho the ingredients are the same and are at the very same concentration. I don't get that. They all seem to be priced about the same too, so I guess you go by what the label says the application is for (sleep versus daytime versus whatever) and which one your doctor says is the one to use. My optometrist said to try Refresh Optive Mega-3 Lubricant Eye drops enhanced with flax seed oil. The 3 basic ingredients that are repeated in many dry eye drop products are these: carboxymethylcellulose, glycerin, and poylsorbate. They don't even list the flaxseed oil. Then, Restasis (prescription only) contains one much different active ingredient which is cyclosporine. It also contains "inactives" which are glycerin, castor oil, and polysorbate 80, and a couple of other ingredients listed as inactives. So, I figure it's just confusing to know which ingredients are the most important. Worth researching more. I hate what appears to be a marketing scheme when they offer so many types which are the same with just different packaging and names.