Dry Eye Disease Study With Brimonidine

Subjects will assess their tolerance to the administration of the study drug, utilizing a Visual Analog Scale (VAS). The VAS is a 100-mm horizontal line with verbal descriptors at either end. The VAS ratings will be completed after administration of the study drug on Day 1 (post-dose), Day 28, Day 56, Day 84, and Day 105. Subjects will place a single slash mark across the horizontal line between the end labeled "completely intolerable" (0 mm) and "easily tolerable" (100mm).