Health
Missing indigo wavelength in indoor LED light may contribute to myopia risk, study suggests
Researchers found that exposure to indigo light prevented nearsightedness in tree shrews, prompting plans to test enriched lighting in human daycares.
The short version
- A study published in Cell Reports Medicine found that indigo light (419–446 nanometers) completely prevented nearsightedness in tree shrews.
- Standard indoor white LEDs lack sufficient indigo light wavelengths, which are abundant in natural sunlight and stimulate nonvisual opsin receptors necessary for proper eye development.
- Researchers plan to install indigo-enriched lighting in daycare spaces to test whether full-spectrum indoor lighting can safely prevent myopia in children.
Key facts
- Exposure to indigo light with wavelengths between 419 and 446 nanometers completely prevented myopia development in tree shrew experiments.[ScienceDaily]
- The study was published on August 18, 2026, in Cell Reports Medicine by researchers at Cincinnati Children's Hospital Medical Center and the University of Alabama at Birmingham.[ScienceDaily]
- Tree shrews were selected as test subjects because their near-primate lenses block light below 400 nanometers, similar to human lenses.[ScienceDaily]
- Common white LED bulbs peak around 450 nanometers and contain limited indigo light compared to natural sunlight.[ScienceDaily]
- Study authors Richard Lang and Rafael Grytz are listed as inventors on pending patents related to the lighting technology, and Grytz is founder of startup Electric Indigo.[ScienceDaily]
What remains uncertain
- It remains unverified whether indigo-enriched lighting will effectively or safely prevent myopia in human children, pending clinical trials in daycare settings.[ScienceDaily]
Sources
- A missing color in indoor light may help prevent myopiaScienceDaily - Health