Refractive Status and Accommodation Response Under Different Experimental Conditions.

Launched by ESSILOR INTERNATIONAL · Mar 22, 2024

Keywords

ClinConnect Summary

This clinical trial is studying how well the eyes focus on objects at different distances and how this ability can change under various conditions. The researchers are particularly interested in understanding issues related to accommodation, which is the eye's ability to adjust focus for seeing things up close. They have found that while devices used by eye care professionals can accurately measure how well we see far away, they may not be as reliable for measuring near vision.

To participate in this study, you need to be a healthy adult between 18 and 40 years old who has had a vision check within the last year. You should not have any eye problems or conditions that could affect your vision or ability to follow instructions. If you qualify, you can expect to spend at least two hours at the research site, where you will undergo tests to measure how your eyes respond to different focusing tasks. It's also important to note that certain individuals, such as those with specific eye conditions or those who have had eye surgery, will not be eligible to participate.

Gender

ALL

Eligibility criteria

• 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)