Has anybody had any positive experiences with biotears? And how do they compare to theratears? The company of biotears seem pretty confident in their product in that many people's dry eye symptoms disappear. I don't have severe dry eyes, as I can function during the day without the need for drops (usually, except for heavy computer use, and in dry air rooms), however my eyes get very dry every single night while I sleep and as im only 19 I would like to put an end to it ( and maybe even get back into contacts one day!). Are these something that would be worth putting hope/$35 into?