I worked as an opthalmic tech for a few years, and anecdotally, my patients had the most success with Systane Gel. I rarely, if ever, use eye drops, but I have a bottle of that and it's very good. Avoid anything that advertises red-eye relief. They can cause acute problems including ACA Glaucoma (Anatomically Narrow Angles can exist in patients who have never seen an optho), at least this is what the drug rep told us (about his own products).