How posture and eye movements change during screen use with different eyeglasses in adults 18–65
Official title: Etude Des Comportements Posturaux et Oculomoteurs Durant l'Utilisation d'Outils Digitaux
Run by Essilor International · NCT07499180 · Data updated 2026-11-12
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
| Study type | Interventional |
|---|---|
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 69 (estimated) |
| Sponsor | Essilor International Industry-sponsored |
| Locations | 1 site (Paris) |
| Status | Recruiting |
| Started | April 7, 2026 |
| Main results expected | October 2026 |
| Study ends | October 2026 |
| Registry record updated | April 13, 2026 |
| Trial ID | NCT07499180 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a 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.
✕Probably 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.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
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.
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 gone: 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.
Who can join: the full rules
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 it's running
-
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
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.