Strong LED Lights Can Cause Severe Light Poisoning Or Blindness

- May 31, 2019-

The "blue light" in LED lighting can damage the retina of the eye and disrupt the natural rhythm of sleep, France's health watchdog said this week.


In a statement, the French food, environment and occupational health safety authority (ANSES) warned that the new findings confirmed previous concerns that "exposure to high-intensity LED lights produces' phototoxicity 'and may cause irreversible damage to retinal cells and vision loss".


In a 400-page report, the French safety agency for food, environment and occupational health recommended that the maximum levels of severe exposure should be revised, even though they are rarely met at home or in the workplace.


LED phone, tablet and laptop screens are not harmful to the eyes, but the intense light used in car headlights could be, according to research.The report distinguishes between acute exposure to high-intensity LED lights and "chronic exposure" to low-intensity light sources.Although the risk is low, long-term exposure to the light can also accelerate the aging of retinal tissue and cause vision loss, the agency said.


Eye doctor Francine bihar Cohen said LED phone, tablet and laptop screens are not harmful to the eyes.He explained that their brightness is very low compared to other types of lighting.But these backlighting devices, especially when used at night or in the dark, can interfere with the body clock and affect sleep.


Not only do they interfere with the body's natural circadian rhythms, they also contribute to metabolic disorders such as diabetes, cardiovascular disease and certain cancers, according to dina attiya, ANSES researcher and project manager.ANSES points out that children and adolescents are particularly vulnerable to this disruption of biological rhythms because the lens in their eyes is not fully formed.In addition, stroboscopic phenomena in some LED lights can cause headaches, visual fatigue and other unexpected hazards due to small fluctuations in the current, the report said.


ANSES recommends buying warm white LED lights for home lighting, reducing exposure to high-density blue leds, and avoiding LED screens before bedtime.


ANSES also says manufacturers should "limit the intensity of the headlights", some of which are too bright.


Finally, the agency is skeptical about the effectiveness of some "blue-blocking" filters and sunglasses.