Impact of Tear Substitute Use on Dry Eye in Gamers.

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.