Any decent lubricant drop will work well. Most drops use glycerin as the lubricant, but some of the "fancy" drops use mineral oils and do not have preservatives, and this is why they have to be sealed in little plastic vials.
I am on my sixth eye surgery in two years, and when you have any kind of procedure like PRK or Lasik, the doctors generally recommend the preservative free drops, but that is probably more because they sealed, so far less chance of infection.
For normal lubricating though, a glycerin based drop is pretty much just as effective. Between surgeries, my doctor has suggested that I use just regular drops frequently, but after surgery, he always insists using the sealed ones for one week.
I agree that drops are a fantastic idea, but there is no real need to spend a huge amount of money on preservative free drops if the normal drops do not cause you any problem.
Important point. There are a lot of drops out there that are for stuff other than dry eye, so make sure that you don't pick one that is "Redness" or anything else other than "Lubricating" your eye. The package should just say "For dry eyes" or "Lubricating" eyes.
I have become a big fan of lubricating drops and I use drops several times a day (I started at my doctor's request). I recommend now that everyone use them if they have a tendency to have dry eyes.
Edited by Eddgie, 27 May 2019 - 01:18 PM.