Healthy Adults
Conditions
Brief summary
The goal of this clinical study is to evaluate how adults aged 18 to 65 move their bodies and eyes when they use screens, with various eyeglasses. The main questions it aims to answer are : * How the behaviour between young and presbyopes is different while performing visual tasks on digital devices ? * How the behaviour while performing visual tasks changes according to different types of eyeglasses ? Participants will be asked to take part in an eye exam and do simple visual tasks on digital devices.
Interventions
DEVICEEye exam
Participants will get an eye exam
OTHERBody posture and eye movements behaviour of digital device users
Measurement of the body posture and eye movements behaviour of digital device users while performing simple visual tasks with various types of lenses
Sponsors
Essilor International
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE
Intervention model description
3 groups will follow different interventions. * Young adults (18-35) : will test single vision lenses * Presbyopes not used to wear progressive lenses (43-50) : will test single vision and progressive lenses * Presbyopes used to wear progressive lenses (51-65) : will test single vision and progressive lenses
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
Yes
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Quantification of Gaze Lowering using an eye-tracker device | From enrollment to 3 months after enrollment | Quantitative Assessment of eye movements in degree with an eye-tracker during visual tasks |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Quantification of Head and body inclination with a motion capture system | From enrollment to 3 months after enrollment | Quantitative evaluation of postural behavior in degree with a motion capture system while performing visual tasks |
| Digital device usage distance using motion capture system | From enrollment to 3 months after enrollment | Quantitative assessment of digital devices' usage distance during visual tasks |
| Correlation between refraction profile and visual tasks' postural behavior | From enrollment to 3 months after enrollment | Statistical analysis of the association between participant's refraction characteristics and their visual tasks' behavioral patterns (Quantification of Gaze Lowering, Quantification of head and body inclination, Digital device usage distance) |
| Correlation between binocular vision profile and visual tasks' postural behavior | From enrollment to 3 months after enrollment | Statistical analysis of the association between participant's binocular vision characteristics and their visual tasks' behavioral patterns (Quantification of Gaze Lowering, Quantification of head and body inclination, Digital device usage distance) |
| Correlation between accommodation profile and visual tasks' postural behavior | From enrollment to 3 months after enrollment | Statistical analysis of the association between participant's accommodation characteristics and their visual tasks' behavioral patterns (Quantification of Gaze Lowering, Quantification of head and body inclination, Digital device usage distance) |
| Correlation between head-eye ratio profile and visual tasks' postural behavior | From enrollment to 3 months after enrollment | Statistical analysis of the association between the head-eye ratio (relative contribution of the head and the eye in a composite movement involving both of them) and the visual tasks' behavioral patterns (Quantification of Gaze Lowering, Quantification of head and body inclination, Digital device usage distance) |
Countries
France
Contacts
CONTACTChloé Moger
CONTACTValérie Parmentier
PRINCIPAL_INVESTIGATORChloé Moger
Essilor International
Outcome results
None listed