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Cataract lens color may influence sleep quality

NCT ID NCT02304900

Knowledge-focused Sponsor: University Hospital, Tours 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 2 times

Summary

This study looked at 400 people aged 60-90 who had cataract surgery. They received either a white or yellow artificial lens. Researchers wanted to see if the color of the lens affected sleep time, sleep quality, and mood two months after surgery. The idea is that blue light filtering (yellow lens) might change the body's internal clock.

What this could mean

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

Active substance
intraocular lens implant (white or yellow)
What this could lead to
If it works, this could help surgeons choose an implant color that improves sleep and mood after cataract surgery.
What could go wrong
This is a completed study with no phase designation, so results may not be conclusive. The effect of lens color on sleep is still uncertain and may vary by individual.

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

400 people

The number who actually took part.

Start date

Dec 2009

Finished

Dec 2012

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

60 to 90 years

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: * female or male subject * subject between 60 and 90 years old * Visual acuteness \< or = with 2 eyes * Indication operating of the cataract Exclusion Criteria: * NA

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Conditions

The condition(s) this trial relates to.

cataract

As listed by the trial registrant

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

Cataract

Contacts and locations

Locations

  • Service d'Ophtalmologie

    Brest, France

  • Service d'Ophtalmologie

    Tours, 37, France

  • Service d'Ophtalmologie, Centre Hospitalier Paul Martinais

    Loches, 37600, France

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