This study characterizes acute dry eye symptom control, assessed during exposure to a Controlled Adverse Environment, following use of the TrueTear for 45 days.

Subjects will be instructed to use the TrueTear daily for approximately 45 days with assessments in the Controlled Adverse Environment taking place on Day 0 and Day 45. Upon entering the CAE, participants will complete dry eye symptom questionnaires every five minutes and will administer the device when a certain level of ocular discomfort has been reached.

Inclusion Criteria:

• Have used and/or desired to use an artificial tear substitute for dry eye symptoms within 6 months prior to the Screening Visit
• Normal lid/lash anatomy, blinking function and closure as determined by the Investigator
• Literate, able to speak English, and able to complete questionnaires independently

Exclusion Criteria:

• Chronic or recurrent epistaxis, coagulation disorders or other conditions that, in the opinion of the Investigator, may lead to risk of clinically significant increased bleeding
• Nasal or sinus surgery (including history of application of nasal cautery) or significant trauma to these areas
• Contact lens use within 7 days prior to the Screening Visit or anticipate the use of contact lenses at any time during the study
• Corneal transplant in either or both eyes
• Cardiac demand pacemaker, implanted defibrillator, or other active implanted metallic or active implanted electronic device in the head
• A woman who is pregnant, nursing an infant, or planning a pregnancy during the duration of the study
• Currently enrolled in an investigational drug or device study or have used an investigational drug or device within 30 days prior to the Screening Visit

Day 45