Abbvie's Refresh brand can get a little confusing because there are so many.
The most popular are Refresh PM (the ointment), Refresh Optive Mega (with castor oil and flaxseed oil), and Refresh Celluvisc (which is popular amongst scleral lens users as an off-label addition to filling solutions). Refresh Plus is a good thin (non-blurring) drop - actually just a lower concentration of the same ingredient in Celluvisc. If you're a Costco member you can get a 70-pack of Refresh Plus, which is a pretty good deal for a brand name drop.
If you're curious about the differences amongst the entire Refresh family, check out this blog post which breaks them down by ingredients.