- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06331780
Refractive Status and Accommodation Response Under Different Experimental Conditions.
Study Overview
Status
Intervention / Treatment
- Device: Visual acuity
- Device: Objective refraction
- Device: Objective monocular accommodation amplitude measurement
- Device: Subjective monocular accommodation amplitude measurement with the "Push-Up" method
- Device: Subjective monocular accommodation facility measurement with the "Rock" method:
- Other: CISS Questionnaire
- Other: Difficulty assessment questionnaire
- Other: Subjective evaluation questionnaire
Detailed Description
Clinical Development stage and rationale
The clinical development stage is pilot stage as defined in ISO 14155:2020 (Annex I section 1.3.2).This clinical investigation is an exploratory clinical investigation as mentioned in the Medical Device Regulation EU 745/2017, also named early feasibility clinical investigation in the ISO 14155:2020. The necessity of such clinical investigations is more precisely described by the Food and Drug Administration (FDA) (Attachment E CDRH Final Guidance Cover Sheet) and Agence Nationale de Sécurité du Médicament et des produits de santé (ANSM), where they detail the importance of exploratory studies in pivotal investigation design.
Medical devices often undergo design improvement during development, with refinement during lifecycles beginning with early research, extending through investigational use and initial marketing of the approved or cleared product, and continuing to subsequently approved or cleared commercial device versions.
Objectives and hypotheses of the clinical investigation
This clinical investigation explores new ways of measuring accommodative response, particularly regarding the dynamics and amplitude of response: we chose to vary several parameters.
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Thierry Laloux
- Phone Number: +33 (1) 55 96 54 05
- Email: lalouxt@essilor.fr
Study Locations
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-
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Créteil, France, 94000
- Recruiting
- Essilor International - Ci&T 2
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Contact:
- Jérôme Gillet
- Phone Number: +33 (0)1 49 80 63 40
- Email: gilletj@essilor.fr
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Volunteer: man or woman from 18 to 40 years old,
- Subject declares that his last visit to an ophthalmologist was less than 12 months ago,
- Subjects without a reported pathology, deficit or disorder that can interfere with visual or cognitive functions,
- Subjects, healthy volunteers who have been fully informed of the investigation and signed the informed consent form of the investigation,
- Subjects available for the investigation visits (at least 2 hours),
- Subjects able to appoint a visit in the investigator's site,
- Subjects able to read and understand the protocol (in French), follow the instructions, and give their informed consent approval.
Exclusion Criteria:
- Subjects with spherical equivalent wearing compensation (or fully compensate by contact lenses) ranging out from -3.00 to + 3.00 Dioptres in both eyes,
- Subjects with an astigmatism wearing compensation (or fully compensate by contact lenses) more than 1.00 Dioptres (>1,00DC) in both eyes,
- Subjects with a best compensated monocular VA < 8/10 (>0.1logMAR),
- Persons subject to a legal protection measure (guardianship, curatorship, safeguard of justice, etc.) or unable to express their consent (see Article L 1121-8 of the CSP)
- Persons deprived of their liberty by judicial or administrative decision and persons hospitalised without their consent (article L1121-6 of the CSP),
- Subjects under exclusion period from another investigation,
- Women pregnant or breastfeeding; (Article L1121-5),
- Subjects with a reported neurologic disorder, particularly epileptic or sensory motor troubles,
- Subjects with implanted electronic medical device such as (pacemaker or hearing aid),
- Subjects with a reported severe ocular disease leading to a visual field decrease, VA deficiency or glare sensitivity,
- Subjects with monophtalmia
- Subjects who had ocular surgeries (including aphakia or pseudophakia (intraocular lenses), refractive surgery or trauma),
- Subjects who are ESSILOR INTERNATIONAL employees
- Subjects who are not affiliated to a social security scheme or are beneficiaries of such a scheme (article L1121-8-1 of the CSP).
- Subject with fixation disorder: impossibility to maintain fixation on visual target.
- Subjects who cannot stay comfortable during the tests (e.g. with neck pain ...).
- Pupil abnormality (unusual shape, size <3mm)
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Screening
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Closed-field Aberrometer
Objective refraction at different distances with Shack-Hartmann Aberrometer
|
VA will be measured with an Early Treatment Diabetic Retinopathy Study (ETDRS) chart
Objective refraction will be measured using an auto-kerato-refractometer/aberrometer
Objective monocular accommodation amplitude measurements are obtained dynamically by measuring the subject's dioptric change while the participant focuses on a virtual object that moves from distance
The subjective monocular accommodation amplitude measurements are carried out by the "push-up" method and proceeds as follows:
The amount of accommodation in this eye is equal to the proximity (= 1/distance) of the test when the blur is just perceived. The subjective monocular accommodation facility measurements are carried out by the "Rock" method and proceeds as follows:
This questionnaire relating to the use of the near vision will be submitted
After each near vision measurement, the participant should rate, on a Visual Analogic Score (0-10), the difficulty encountered, from 0: extremely easy to 10: extremely difficult.
The participant may also specify the reasons for the difficulty(ies) encountered during the measurement.
A subjective evaluation questionnaire will be submitted to the participants at the end of the visit.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Accommodative response measured with closed-field aberrometer with different target displacement methods
Time Frame: One day (measurements are taken during the single visit)
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Accommodative response (Dioptries)
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One day (measurements are taken during the single visit)
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Accommodative response measured with closed-field aberrometer with different displayed targets
Time Frame: One day (measurements are taken during the single visit)
|
Accommodative response (Dioptries)
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One day (measurements are taken during the single visit)
|
Objective refraction measured with closed-field aberrometer and two camera exposure times
Time Frame: One day (measurements are taken during the single visit)
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Sphere (Dioptries), Cylinder (Dioptries), Axis (°) and High Order Aberrations (Zernike polynomials)
|
One day (measurements are taken during the single visit)
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Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Jérôme Gillet, ESSILOR INTERNATIONAL - Division Instruments
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- WS10370
- 2023-A02153-42 (Other Identifier: ANSM (France))
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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