Read all the postings about the diagnosis and treatment of dry eyes. Beta blockers are not a medication that would likely make dry eyes develop or get worse.
JCH III MD
Dry eye syndrome is very common after Lasik. Mine turned into corneal erosion. There is an explosion of research now on Lactoferrin (a lipid in tears) for many purposes: ulcers, gastrointestinal flora balance, antibacterial, anti-inflammatory, osteoporosis, autoimmune disorders such as arthritis, dry eye syndrome, et al.
Here is a url that might interest you re dry eye syndrome:
http://abstracts.iovs.org/cgi/content/abstract/46/5/2046
This particular study used 270 mg per day.