Systane® Lubricant Eye Drops http://www.samsclub.com/sams/systane-lubricant-eye-drops-2-1oz-
This one is much better than artificial tears, at least for my mom. You can
also buy it at Wal-Mart and local drug stores. It's a bit cheaper at Sam's
Club or Costco.
Baozi pls if you find it helpful.