Global clinical score ( the sum of pruritus , stinging/burning , blurred vision , sticky eye sensation , eye dryness sensation , and foreign body sensation ) significantly decreased in the bimatoprost 0.01 % group from baseline 4.7 3.8 to 2.9 2.3 ( P < 0.001 ) and 2.5 2.0 ( P < 0.001 ) at 6-month and 12-month follow-ups , respectively .