Study of Blinking as a Function of Tear Film Quality

The goal of this study is to better understand how eye blinking behavior is linked to the stability of the tear film, in adults aged 18 to 65 years, with or without symptoms of dry eye.

The main questions are:

* Do the results of a New Blink Task reflect tear film stability ? * How are the blink related metrics in relation with each other? Researchers will compare two groups of participants-those without dry eye symptoms and those with dry eye symptoms-to see if blinking measures differ between them and whether these measures relate differently to tear film quality.

Participants will:

* Answer a questionnaire about dry eye symptoms * Have their visual correction measured (if they wear glasses) * Undergo non-invasive assessments of tear film quality using an imaging device * Complete three types of blink tasks, each repeated three times, including measurements of blinking and of tear film stability