Placebo ophthalmic solution and 3% DE-089 ophthalmic solution
DrugPlacebo ophthalmic solution; 1 drop, 6 times daily (every 2-3 hours) instilled into both eyes for 2-week run-in period 3% DE-089 ophthalmic solution; ; 1 drop, 6 times daily (every 2-3 hours) instilled into both eyes for 4-week treatment period