Comportement Visuo-postural Des Adolescents Myopes et Non Myopes (CALYPSO)
The goal of this observational study is to learn whether different types of eyeglasses prescription and different types of lenses change how close teenagers hold objects when looking at them up close. The study includes adolescents who are non-myopic and adolescents who are myopic and wear either single-vision lenses or lenses slowing down myopia progression. The main questions it aims to answer are: Do teenagers in these three groups use different average working distances (eye-to-object distance) during everyday tasks? Does wearing Essilor® Stellest® lenses change working distance compared with wearing single-vision lenses? Researchers will compare the three groups to see if their working distances differ. Participants will: Complete an initial optometric eye examination. Come for a second visit where they perform everyday activities while wearing a motion-capture system that measures how they move and how far they hold objects.
• Volunteer adolescent, fluent in French, able to follow protocol and read and write
• Aged between 12 and 17 years and 6 months
• Adolescent with no history, according to the participant and/or their legal representatives, of any pathology, deficit, or disorder that could interfere with visual or cognitive functions.
• If the subject wears glasses, they must have an ophthalmic prescription dated within the last year, certifying that a consultation was carried out during the previous year
• If the subject wears Essilor® Stellest® 1.0 lenses, they must have worn them for at least two (2) consecutive months prior to inclusion in the study.
• If the subject is nearsighted: -6.5D ≤ equivalent sphere ≤ -0.5D with usual correction
• If the subject is not nearsighted: -0.5 \< equivalent sphere ≤ +2.5