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Red light device shows promise for tired eyes in older adults

NCT ID NCT06745661

Symptom relief Sponsor: The Hong Kong Polytechnic University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested whether using a red-light device twice a day for a month can reduce visual fatigue in people aged 40 and older with presbyopia (age-related difficulty seeing up close). Sixty-six participants either used the real device or a sham device. Researchers measured changes in eye strain symptoms, eye movements, and focus ability. The goal is to find a simple, non-drug way to ease eye discomfort that affects daily life and work.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
repeated low-level red-light therapy device
What this could lead to
If it works, this could offer a simple, at-home device to reduce eye strain and discomfort for people with age-related reading vision problems.
What could go wrong
This is a small, early-stage study with only 66 participants. The results may not apply to everyone, and the sham device control means the benefit could be partly a placebo effect.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

66 people

The number who actually took part.

Started

Feb 2025

Finished

May 2025

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Ages

40 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * Individuals aged over 40 years old. * Self-reported visual fatigue symptoms. * Distance best-corrected visual acuity (BCVA) of 0.5 LogMAR or better, and near visual acuity worse than N8 (20/50) at 40 cm with the subject's habitual distance correction. * Require near correction in daily life. * No light therapy received in the past six months. * Giving informed written consent. Exclusion Criteria: * Presence of diseases that can cause eye pain or headaches, such as strabismus, glaucoma, ocular trauma, conjunctivitis, migraines, keratitis, iridocyclitis, or other self-reported diseases. * Systemic diseases (e.g., epilepsy, photosensitivity, seizure) or illiteracy. * Afterimage time longer than 6 minutes.

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Conditions

The condition(s) this trial relates to.

asthenopia presbyopia

As listed by the trial registrant

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

Asthenopia Presbyopia Visual fatigue

Contacts and locations

Locations

  • The Hong Kong Polytchnic University

    Hong Kong, Hong Kong

More trials for these conditions

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