Cataract lens color may influence sleep quality

NCT ID NCT02304900

Completed Knowledge-focused Sponsor: University Hospital, Tours Source: ClinicalTrials.gov ↗

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.

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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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