Actively Recruiting
Visual and Postural Behavior in Myopic and Non-Myopic Teenagers
Led by Essilor International · Updated on 2026-04-03
100
Participants Needed
1
Research Sites
56 weeks
Total Duration
On this page
AI-Summary
What this Trial Is About
The goal of this observational study is to learn whether different types of eyeglasses prescription and different types of lenses change how close teenagers hold objects when looking at them up close. The study includes adolescents who are non-myopic and adolescents who are myopic and wear either single-vision lenses or lenses slowing down myopia progression. The main questions it aims to answer are: Do teenagers in these three groups use different average working distances (eye-to-object distance) during everyday tasks? Does wearing Essilor® Stellest® lenses change working distance compared with wearing single-vision lenses? Researchers will compare the three groups to see if their working distances differ. Participants will: Complete an initial optometric eye examination. Come for a second visit where they perform everyday activities while wearing a motion-capture system that measures how they move and how far they hold objects.
CONDITIONS
Official Title
Visual and Postural Behavior in Myopic and Non-Myopic Teenagers
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Volunteer adolescent, fluent in French, able to follow protocol and read and write
- Aged between 12 and 17 years and 6 months
- No history of any pathology, deficit, or disorder affecting visual or cognitive functions according to participant or legal representatives
- If wearing glasses, must have an ophthalmic prescription dated within the last year
- If wearing Essilor�ae Stellest�ae 1.0 lenses, must have worn them for at least two consecutive months before inclusion
- If nearsighted, equivalent sphere between -6.5D and -0.5D with usual correction
- If not nearsighted, equivalent sphere between -0.5 and +2.5
You will not qualify if you...
- Age 12 years or younger
- Age over 17 years and 6 months
- Pregnant or breastfeeding women
- Persons deprived of liberty by judicial or administrative decision or hospitalized without consent as specified by law
- Participants currently excluded from another study
- Persons protected under French law articles L1121-5 to L1121-9
- Declared neurological deficits including epilepsy or sensorimotor coordination disorders
- Severe eye diseases causing vision loss or discomfort such as glaucoma or retinitis pigmentosa
- Gougerot-Sj�f6gren syndrome or declared dry eye syndrome
- Declared aphakia or pseudophakia
- Declared systemic pathology or medical treatment affecting vision
- Muscle paralysis
- Binocular vision problems like amblyopia, strabismus, or nystagmus
- Children or employees of Essilor International, Luxottica, GrandVision and subsidiaries
- History of refractive surgery, strabismus surgery, or any eye surgery
AI-Screening
AI-Powered Screening
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Trial Site Locations
Total: 1 location
1
Paris Bastille
Paris, France, 75012
Actively Recruiting
Research Team
D
David Rio, Phd
CONTACT
S
Sébastien Fricker
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NON_RANDOMIZED
Model
PARALLEL
Primary Purpose
BASIC_SCIENCE
Number of Arms
3
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