• Too much might not be good for your eyes

    Blue light blues: Too much might not be good for your eyes

    By Amy Leap  Pocono Record Writer

    Blue light exposure is important to humans because it regulates the body’s biological clock, alertness and metabolic processes.Because most electronics — computer screens, iPads and cell phones — use light-emitting diodes, or LEDs, as the light source and so many of us depend on electronics for work and communication as well as relaxation, researchers are concerned we might be exposing ourselves to too much blue light.”It is when your eyes are exposed to the stronger blue light from light emitting diodes, or LEDs, you risk damage to the retina or macula,” said Dr. John J. Glasner, co-owner of Eye Associates of Monroe County, Stroudsburg.Of course, the sun is a natural source for blue light and that is the best, he said.The increasing number of electronic devices created to make our lives easier — laptops, tablets, smartphones and digital screen TVs — are energy efficient, but they also increase the exposure to blue light from light emitting diodes or LEDs, he said.The barrage of LED lights most of us are exposed to are stronger than what we are exposed to with incandescent light. The exposure to the stronger blue light is now being linked to age-related macular degeneration as well as the interruption of our normal circadian rhythms.                                LED lighting vs. incandescent                                                                                                                                                                                           Incandescent bulbs produce light by using electricity to heat a metal filament until it becomes “white hot,” or incandescent. While the light is on, 90 percent of the energy created is released as heat.Unlike incandescent, which emits light and heat in all directions, LEDs are directional light sources. They only emit light in a specific direction, making them more efficient. They also absorb most of the heat they create, according to Energy Star.Because LED lighting is more energy efficient and much cooler than incandescent light, it is used in most electronic devices.“Blue light has a very short wavelength, so it produces a higher amount of energy. Studies suggest that over time as the eyes are exposed to the blue end of the light spectrum, the light could cause serious long-term damage to the macula and retina,” Glasner said.Research on just how blue wavelength effects eye is just scratching the surface, but there is a correlation, he said……

  • Read more: http://www.poconorecord.com/article/20150513/ENTERTAINMENTLIFE/150519742/101116/LIFESTYLE
  • Source: Poconorecord 
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