Scientists at John Carroll University in Ohio, working in its Lighting Innovations Institute, have developed an affordable accessory that appears to reduce the symptoms of ADHD. Their discovery also has also been shown to improve sleep patterns among people who have difficulty falling asleep. The principle is easy and clever: The John Carroll researchers have created glasses designed to block blue light, therefore altering a person’s circadian rhythm, which leads to improvement in ADHD symptoms and sleep disorders.
The individual puts on the glasses a couple of hours ahead of bedtime, advancing the circadian rhythm. The special glasses block the blue rays that cause a delay in the start of the flow of melatonin, the sleep hormone. Normally, melatonin flow does not begin until after the individual goes into darkness. Studies indicate that promoting the earlier release of melatonin results in a marked decline of ADHD symptoms. The blue-blocking glasses provide better sleep, according to the scientists. They are also supposed to avoid postpartum depression, to prevent Seasonal Affective Disorder.
An alternative to the glasses has also been developed in the form of night lights and light bulbs with coatings that block the blue light. Instead of wearing the glasses, an individual may simply turn off ordinary lights and, instead, turn on the ones with filters that remove the blue rays. The night light is a convenient “plug-in” device. The invention is comparatively cheap: The cost of the items ranges from approximately $5 for light bulbs and night lights to $40 to $60 for glasses.
MEDICA.de; Source: John Carroll University