Inclusion Criteria:  Patients 18 years and older Patients willing to take an electronic survey about their tolerability of either study medication. Patients with a recent exacerbation of dry eye characterized by ocular surface discomfort.  Exclusion Criteria:  Active, systemic or local disease condition other than DES that causes clinically significant ocular surface irritation that could interfere with the evaluation and treatment of dry eye.  Any of the following ocular (eye or eyelid) conditions in either eye within 1 Months prior to the enrollment visit:  Ocular surgery (e.g., intraocular, oculoplastic, corneal or refractive surgery procedure) Clinically significant ocular trauma. Active ocular Herpes simplex or Herpes zoster (eye or eyelid) infection. Ocular inflammation (uveitis, iritis, scleritis, episcleritis, keratitis, conjunctivitis) Ocular infection (e.g., viral, bacterial, mycobacterial, protozoan or fungal infection of the cornea, conjunctiva, lacrimal gland, lacrimal sac or eyelids including hordeolum/stye) Moderate to severe (Grade 2-4) allergic, vernal or giant papillary conjunctivitis Eyelid abnormalities that significantly affect lid function (e.g., entropion, ectropion, tumor, edema, blepharospasm, lagophthalmos, severe trichiasis, severe ptosis) Ocular surface abnormality that may compromise corneal integrity (e.g., prior chemical burn, recurrent corneal erosion, corneal epithelial defect, Grade 3 corneal fluorescein staining, or map dot fingerprint dystrophy) Participation in another ophthalmic clinical trial involving a therapeutic drug or device within 30 days prior to the distribution of the survey Participation in this trial in the same patient's fellow eye. Patients who are pregnant or breastfeeding or who may become pregnant during participation in the study.