How posture and eye movements change during screen use with different eyeglasses in adults 18–65
Etude Des Comportements Posturaux et Oculomoteurs Durant l'Utilisation d'Outils Digitaux
This project will test whether adults 18 to 65 move their bodies and eyes differently when using screens while wearing various types of eyeglasses.
Quick facts
| Phase | Not applicable |
|---|---|
| Study type | Interventional |
| Enrollment | 69 (estimated) |
| Ages | 18 Years to 65 Years |
| Sex | All |
| Sponsor | Essilor International Industry-sponsored |
| Locations | 1 site (Paris) |
| Trial ID | NCT07499180 on ClinicalTrials.gov |
What this trial studies
Adults aged 18–65 will receive an eye exam and then perform simple visual tasks on digital devices while wearing different eyeglass configurations. Researchers will record body posture and eye-movement behavior during those tasks to compare younger and presbyopic participants and to compare different lens types. The protocol focuses on controlled device tasks in a clinic setting and uses objective measurements of head, neck and eye position. Data will be analyzed to identify systematic differences related to age and spectacle design.
Who should consider this trial
Good fit: Adults 18–65 with distance refractive error between -3D and +3D, astigmatism ≤1D, anisometropia ≤1.5D, minimum corrected visual acuity of 8/10, stable binocular vision, and for presbyopes an addition between 0.75D and 2.75D.
Not a fit: People with significant ocular disease, prior ocular surgery, binocular vision problems, neurological or vestibular disorders, vertebral/cervical troubles, or those outside the specified refractive ranges are unlikely to benefit from participation.
Why it matters
Potential benefit: If successful, the findings could inform better eyeglass designs or guidance to reduce discomfort and improve comfort during screen use.
How similar studies have performed: Prior eye‑tracking and ergonomic studies have shown posture and gaze changes during screen use, but direct comparisons across multiple eyeglass designs and age groups remain relatively limited.
Eligibility criteria
Show full inclusion / exclusion criteria
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
Where this trial is running
Paris
- Essilor International — Paris, France (Recruiting)
Study contacts
- Principal investigator: Chloé Moger — Essilor International
- Study coordinator: Chloé Moger
- Email: mogerc@essilor.fr
- Phone: +33(0)155964827
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.