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Recruiting NCT07499180

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

No phase Interventional Healthy Adults

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
The protocol lists: Eye exam, Body posture and eye movements behaviour of digital device users.
Who it may be relevant to
Registry conditions: Healthy Adults. Basic parameters: 18 years — 65 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
France
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

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Official title

Etude Des Comportements Posturaux et Oculomoteurs Durant l'Utilisation d'Outils Digitaux

Overview

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

  • Device Eye exam
    Participants will get an eye exam
  • Other Body 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

Primary outcome measures

  • Quantification of Gaze Lowering using an eye-tracker device [Time frame: From enrollment to 3 months after enrollment]
Secondary outcome measures (6)
  • Quantification of Head and body inclination with a motion capture system [Time frame: From enrollment to 3 months after enrollment]
  • Digital device usage distance using motion capture system [Time frame: From enrollment to 3 months after enrollment]
  • Correlation between refraction profile and visual tasks' postural behavior [Time frame: From enrollment to 3 months after enrollment]
  • Correlation between binocular vision profile and visual tasks' postural behavior [Time frame: From enrollment to 3 months after enrollment]
  • Correlation between accommodation profile and visual tasks' postural behavior [Time frame: From enrollment to 3 months after enrollment]
  • Correlation between head-eye ratio profile and visual tasks' postural behavior [Time frame: From enrollment to 3 months after enrollment]

Eligibility 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

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: Yes

Study design

Allocation
Non-randomized
Model
Parallel assignment
Masking
Open label
Primary purpose
Basic science

Study locations

France · 1 center
  • Essilor International — Paris

Identifiers

NCT: NCT07499180 · WS10482 · 2025-A02528-41

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗