Impact of Tear Substitute Use on Dry Eye in Gamers.

Adult attendees to a Gamers convention will complete questionnairs and undergo an opthalmological evaluation before and after playing for 3 days in a row. Participants will be randomized into 2 groups of equal size:

• Study group.
• Control group. The Study group will instill hyaluronic acid 0.15% artificial tears in both eyes 4 times a day during the 3 days of the video game session, while the control group will not instill artificial tears.

Inclusion criteria

• 18 years or older
• Participants in videogame convention planning to play video games for a minimum of 6 hours daily for the next 3 days.
• Voluntarily accept to participate and sign informed consent form

Exclusion criteria

• Ocular, nasolagrimal or palpebral active condition different from dry eye disease.
• History of ocular trauma or infecction in the last 3 months previous to inclusion.
• History of refractive surgery.
• Visual acuity 0.5 or less in at least 1 eye.
• Ocular medication use in the 3 days prior to inclusion.
• History of systemic condition asociated to dry eye.
• Use of systemic medication known to induce dry eye in the last 30 days.
• Known allergy to hyaluronic acid.
• Pregnant or lactating women.