The latest research in the field of vision has been shedding a new light on BLUE LIGHT.
We rely on blue light, which occurs naturally as a portion of sunlight, to control our biological clocks. Blue light affects our body’s melatonin levels. Melatonin is the chemical “signal” that tells us when to wake up and when to go to sleep. Becauseit comes from the sun, exposure is limited to daylight hours. But, too much exposure to blue light, over the course of a lifetime, is now suspected of contributing to retinal damage (ARMD: Age Related Macular Degeneration).
There is a real growing concern over the artificial sources of blue light that are very quickly becoming too commonplace. The new, efficient light sources, such as fluorescent, halogen, and LED all emit high levels of blue light (incandescent bulb emit very little blue… but they are no longer available). Smart phones, tablets, monitors, and flat panel TV’s also emit very high levels of blue light. Some people could experience sleeping difficulties brought on by continuous blue light exposure. Children face a significantly higher risk because they will be receiving more exposure, naturally and artificially, compounded by the ever growing amount of time spent in front of a tablet.
There are now “Blue Blocker” lenses available from every major lens manufacturer, and most prescription types (single vision, bifocal, or progressive) can be ordered. For outdoors protection Optics Plus would recommend “BlueTech Sun,” polarized blue filter. BlueTech also has an indoor, lightly tinted version. Blue reducing coatings from Crizal or Hoya are also excellent options, especially for children or “techies” who spend hours in front of a screen..