However, there is concern about the long-term effects of screen exposure especially with excessive screen time and when a screen is too close to the eyes. Is too much exposure to blue light unhealthy?īlue-light exposure from screens is small compared to the amount of exposure from the sun. Inadequate exposure to blue light can also contribute to the recent increase in myopia, or nearsightedness. Sunlight is also important for the growth and development of the eyes and vision in children. It regulates the circadian rhythm, the body's natural wake and sleep cycle. What are the health benefits of blue light?īlue light boosts alertness, helps memory and cognitive function, and elevates mood. Artificial sources of blue light include fluorescent light, compact fluorescent light (CFL) bulbs, LEDs, flat screen LED televisions, computer monitors, smart phones and tablet screens. Sunlight is the most significant source of blue light. About one-third of all visible light is considered high-energy visible, or 'blue,' light. Vibrating within the 380 to 500 nanometer range, it has the shortest wavelength and highest energy. What is blue light?īlue light is part of the visible light spectrum - what the human eye can see. Using electronic devices at night without adjusting the amount of blue light that shines from the screen can affect sleep. But is all of that blue light shining from screens harmful to our health? Melissa Barnett, principal optometrist at the UC Davis Eye Center, talks about the effects of blue light and what you can do to reduce the health risk. This ability is restricted to Pearls only other gem types must go to an Angelite.From televisions and smartphones to tablets and gaming systems, most of us are glued to our electronic devices.

'Repair Station' - Nacres can also repair damaged Pearls.

The exact process is unspecified and unknown, but it is not foolproof Pearls can still be created incorrectly, so one might assume it requires effort from the Nacre. 'Goddess of Life' - Nacres are able to create and shape Pearls. While they do not have much authority over others compared to other authoritative figures, they have full control within the Reef, where they create Pearls and distribute them to deserving gems and locations that need assistance with small tasks that Pearls can perform. Nacres are the only gem capable of creating life besides the Diamonds. They wear floor-length dresses with circular designs and high, frilly collars and their gems resemble clam shells. Standard cuts come in a variety of colors, all washed out with short, fluffy, light hair.

Nacres are among the tallest single gem types, slightly larger than Kyanites.

Blue light ivia 2011b