Potential participants will undergo an eye examination consisting of medical history and physical examination (i.e., visual acuity, pupillary exam, examination of the lids, slit-lamp examination of the conjunctiva, cornea, anterior chamber, iris, and lens, and funduscopic examination). Participants qualifying for the study will then stop all eye medications and will use a common artificial tear solution for 2 weeks prior to the baseline examination. We will evaluate 4 measures of dry eyes at baseline and after 6 weeks of therapy: 1) tear film to break-up; 2) staining of the cornea by fluorescein stain; 3) measurement of tear production over 5 minutes by Schirmer's test; and 4) the Ocular Surface Disease Index (OSDI).