How teenagers with and without myopia hold things and move when wearing different eyeglass prescriptions

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study compares three groups of 12- to 17.5-year-old adolescents: non-myopic teens, myopic teens wearing single-vision lenses, and myopic teens wearing Essilor Stellest lenses. Participants first receive an optometric exam and then return for a motion-capture session while doing everyday near tasks, during which eye-to-object distance and postural movements are measured. The investigators will compare average working distances and posture metrics across the three groups to see if lens type is associated with different visual or postural behavior. The study is conducted at a single site in Paris and is sponsored by Essilor International.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Volunteer adolescent, fluent in French, able to follow protocol and read and write
* Aged between 12 and 17 years and 6 months
* Adolescent with no history, according to the participant and/or their legal representatives, of any pathology, deficit, or disorder that could interfere with visual or cognitive functions.
* If the subject wears glasses, they must have an ophthalmic prescription dated within the last year, certifying that a consultation was carried out during the previous year
* If the subject wears Essilor® Stellest® 1.0 lenses, they must have worn them for at least two (2) consecutive months prior to inclusion in the study.
* If the subject is nearsighted: -6.5D ≤ equivalent sphere ≤ -0.5D with usual correction
* If the subject is not nearsighted: -0.5 \< equivalent sphere ≤ +2.5

Exclusion Criteria:

* Age \< 12 years
* Age \> 17 years and 6 months
* Pregnant or breastfeeding women (Article L1121-5)
* Persons (legal representatives or subjects) deprived of their liberty by a judicial or administrative decision and persons hospitalized without consent pursuant to Articles L. 3212-1 and L. 3213-1 who are not covered by the provisions of Article L. 1121-8 and persons admitted to a health or social care facility for purposes other than research
* Participants who are currently excluded from another study
* All categories of persons who are particularly protected under French law are excluded from this research (Articles L1121-5 to L1121-9 of the Public Health Code)
* Declared neurological deficit, in particular a history of epileptic pathology or sensorimotor coordination disorders, vestibular or cerebellar pathology (e.g., balance disorders)
* Severe declared eye disease involving loss of visual field, such as glaucoma, involving loss of acuity and severe discomfort in low-light or overly bright environments, such as retinitis pigmentosa, or declared and treated dry eye syndrome.
* Gougerot-Sjögren syndrome or declared dry eye syndrome
* Declared aphakia or pseudophakia (intraocular implant)
* Declared systemic pathology, medical treatment, or medication with an effect on vision
* People with declared muscle paralysis
* Binocular vision problems such as amblyopia, strabismus, or nystagmus
* Children of employees or employees of Essilor International, Luxottica, GrandVision, and their subsidiaries
* Individuals who have undergone previous refractive surgery, have a history of strabismus surgery, or have a history of any type of eye surgery

Where it's running

• Paris Bastille
  Paris, France Recruiting

Study contacts

• Study coordinator: David Rio, Phd
• Email: riod@essilor.fr
• Phone: +33(0)155964840

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

• Evaluating a device for screening vision problems in young children

  This study is testing a new device to see if it can effectively find vision problems in children aged 3 to 8, whether they wear glasses or not.

  Recruiting Essilor International · Nancy, France and 1 other locations · NCT06882408

• Optimizing light exposure to prevent and control myopia in children

  This study tests if changing classroom lighting to mimic sunlight or using a smartphone app to guide light exposure can help prevent and control myopia in primary school children.

  Recruiting at 5 sites National University of Singapore · Singapore and 4 other locations · NCT06631339

• Hyperopic reserve screening for kindergartners in Beijing

  A population-wide screening tests whether senior kindergarten children in Beijing have enough hyperopic reserve to help prevent future myopia.

  Recruiting Beijing Tongren Hospital · Beijing · NCT07851532

• Do dual-focus multifocal contact lenses improve hand-eye coordination and sports vision compared with your usual lenses

  This study tests whether wearing dual-focus multifocal contact lenses improves hand-eye coordination and sports vision in adults who play baseball or softball and normally wear contact lenses.

  Recruiting Ohio State University · Columbus, Ohio · NCT07840209

• Two monthly silicone hydrogel multifocal toric contact lenses in wearers with astigmatism and myopia

  This study tests whether two popular soft multifocal toric contact lenses perform differently in adults who need vision correction for astigmatism and myopia.

  Recruiting CooperVision International Limited (CVIL) · New York, New York and 2 other locations · NCT07829419

• Seeing clearly in low light after Ray-Tracing guided LASIK

  A trial tests how well WaveLight Plus LASIK works for people with myopia and astigmatism and whether patients are satisfied after the procedure.

  Recruiting Phase 4 Vance Thompson Vision · Sioux Falls, South Dakota · NCT07790185

How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.