From ISTA's 2011 results report (Feb 23, 2012):
Also during the fourth quarter, the Company announced that based on
the results of clinical trials in dry eye, the Company plans to launch
its first over-the-counter (OTC) artificial tear product in the second
half of 2012. Clinical trials conducted in 2011 showed that ISTA's OTC
tear product was highly effective in treating both the signs and
symptoms of dry eye disease as compared to patient baseline.