A Study on Body Posture and Eye Movements During Screen Usage on Adults Aged 18 to 65 Wearing Various Types of Eyeglasses

Inclusion Criteria: * Distance refractive error (equivalent sphere) between -3D and +3D * Astigmatism inferior or equal to 1D * Anisometropia inferior or equal to 1.5D * Addition (for presbyopes) between 0.75D and 2.75D * Minimum corrected visual acuity : 8/10 * Stable binocular vision Exclusion Criteria: * Employee of Essilor, Luxottica, GrandVision and their subsidiaries * Aphakia, pseudophakia or ocular surgery * Reported systemic pathology that affects vision * Medical treatment or taking medications that affect vision * Severe ocular pathology declared, involving a loss of visual field as in glaucoma, a loss of acuity * Reported neurological deficit, including a history of seizure or sensorimotor coordination disorders, vestibular or cerebellar pathology * Binocular vision problems such as amblyopia, strabismus, or double vision * Vertebral or cervical troubles * Difficulty to move, vertigo, ocular migraine