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

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

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.

Study Overview

• Status: Recruiting
• Conditions: Healthy Adults
• Intervention / Treatment: Device: Eye exam; Other: Body posture and eye movements behaviour of digital device users

• Study Type: Interventional
• Enrollment (Estimated): 69
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Chloé Moger; Phone Number: +33(0)155964827; Email: mogerc@essilor.fr
• Study Contact Backup: Name: Valérie Parmentier; Phone Number: +33(0)155964912; Email: PARMENTV@ESSILOR.fr

Study Locations

• France
  • Paris, France, 75012
    • Recruiting
    • Essilor International
    • Contact: Chloé Moger; Phone Number: +33(0)1 55 96 48 27; Email: mogerc@essilor.fr

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

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

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

3

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Young Adults; Young adults will test single vision lenses	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
Experimental: Presbyopes between 51 and 65 wearing progressive lenses; Presbyopes between 51 and 65 will test single vision and progressive lenses	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
Experimental: Presbyopes between 43 and 50 not wearing progressive lenses; Presbyopes between 43 and 50 will test single vision and progressive lenses	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

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Quantification of Gaze Lowering using an eye-tracker device	Quantitative Assessment of eye movements in degree with an eye-tracker during visual tasks	From enrollment to 3 months after enrollment

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Quantification of Head and body inclination with a motion capture system	Quantitative evaluation of postural behavior in degree with a motion capture system while performing visual tasks	From enrollment to 3 months after enrollment
Digital device usage distance using motion capture system	Quantitative assessment of digital devices' usage distance during visual tasks	From enrollment to 3 months after enrollment
Correlation between refraction profile and visual tasks' postural behavior	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)	From enrollment to 3 months after enrollment
Correlation between binocular vision profile and visual tasks' postural behavior	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)	From enrollment to 3 months after enrollment
Correlation between accommodation profile and visual tasks' postural behavior	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)	From enrollment to 3 months after enrollment
Correlation between head-eye ratio profile and visual tasks' postural behavior	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)	From enrollment to 3 months after enrollment

Collaborators and Investigators

• Sponsor: Essilor International
• Investigators: Principal Investigator: Chloé Moger, Essilor International

Study record dates

Study Major Dates

• Study Start (Actual): April 7, 2026
• Primary Completion (Estimated): October 1, 2026
• Study Completion (Estimated): October 1, 2026

Study Registration Dates

• First Submitted: March 16, 2026
• First Submitted That Met QC Criteria: March 23, 2026
• First Posted (Actual): March 30, 2026

Study Record Updates

• Last Update Posted (Actual): April 13, 2026
• Last Update Submitted That Met QC Criteria: April 7, 2026
• Last Verified: April 1, 2026

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Musculoskeletal Physiological Phenomena; Musculoskeletal and Neural Physiological Phenomena; Posture
• Other Study ID Numbers: WS10482; 2025-A02528-41 (Other Identifier: ANSM RCB)

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No