Visual and Postural Behavior in Myopic and Non-Myopic Teenagers

Inclusion Criteria: * 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 Exclusion Criteria: * Age ≤ 12 years * Age \> 17 years and 6 months * Pregnant or breastfeeding women (Article L1121-5) * Persons (legal representatives or subjects) deprived of their liberty by a judicial or administrative decision and persons hospitalized without consent pursuant to Articles L. 3212-1 and L. 3213-1 who are not covered by the provisions of Article L. 1121-8 and persons admitted to a health or social care facility for purposes other than research * Participants who are currently excluded from another study * All categories of persons who are particularly protected under French law are excluded from this research (Articles L1121-5 to L1121-9 of the Public Health Code) * Declared neurological deficit, in particular a history of epileptic pathology or sensorimotor coordination disorders, vestibular or cerebellar pathology (e.g., balance disorders) * Severe declared eye disease involving loss of visual field, such as glaucoma, involving loss of acuity and severe discomfort in low-light or overly bright environments, such as retinitis pigmentosa, or declared and treated dry eye syndrome. * Gougerot-Sjögren syndrome or declared dry eye syndrome * Declared aphakia or pseudophakia (intraocular implant) * Declared systemic pathology, medical treatment, or medication with an effect on vision * People with declared muscle paralysis * Binocular vision problems such as amblyopia, strabismus, or nystagmus * Children of employees or employees of Essilor International, Luxottica, GrandVision, and their subsidiaries * Individuals who have undergone previous refractive surgery, have a history of strabismus surgery, or have a history of any type of eye surgery