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Night vision test could reveal severity of eye disease

NCT ID NCT02617966

Knowledge-focused Sponsor: National Eye Institute (NEI) Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 24, 2026 · Last updated Sep 01, 2026 · Updated 18 times

Summary

This study looks at how well people with retinal diseases like retinitis pigmentosa and Stargardt's disease see in the dark. Researchers want to find out if measuring dark adaptation can help detect and track these conditions. Healthy volunteers and people with retinal disease aged 5 and older can join. Participants will have eye exams, vision tests, and special light sensitivity measurements over several visits.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 500 people

The number the study aims to enrol. It can still change while the study runs.

Started

Mar 2016

Expected to finish

Dec 2029

An estimate. End dates often move.

Lead sponsor

A government research agency

The lead sponsor is the US National Institutes of Health.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

Up to 250 participants with retinal disease will be enrolled and up to 120 healthy volunteers will be enrolled.

Ages

5 to 100 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: * Participant must be five years of age or older. * Participant (or legal guardian) must understand and sign the protocol s informed consent document. * Participant must be able to cooperate with the testing required for this study. For Participants with retinal disease only: * Participant must have retinal disease, defined as evidence of loss of retinal dysfunction and/or degeneration as established by standard clinical methods including perimetry, ERG and imaging. * Participant must have a measurable visual acuity. For Healthy Volunteers only: -Participant must have visual acuity of 20/20 or better, with or without correction (e.g., glasses or contact lens) in at least one eye. EXCLUSION CRITERIA: -Participant with changes in pre-retinal media sufficient to obscure a view of the retina.

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Conditions

The condition(s) this trial relates to.

retinal degeneration retinal disorder retinitis pigmentosa Stargardt disease

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Retinal degeneration Retinitis pigmentosa Stargardt's disease

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • National Institutes of Health Clinical Center

    RECRUITING

    Bethesda, Maryland, 20892, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.