Computer glasses are specially made eyeglasses that are completely different, in a number of key ways, from regular eyeglasses and reading glasses. These differences make computer glasses an indispensable part of maintaining both your short term visual comfort and long term visual health in today's world of ever increasing dependence on our electronic devices for both work and entertainment purposes.
Computer screens are generally positioned in what is considered your “intermediate” zone of vision, which is roughly 20-26 inches from your eyes. Traditional eyeglasses and bifocals are designed to help with close and distance vision, but are not meant to make intermediate viewing of the type required by computer work comfortable. This often leads to blurred vision, eyestrain and headaches after extended computer use. Even trifocals and progressive lenses, which do have areas for intermediate viewing, do not have a large enough intermediate area to make extended computer viewing comfortable. This causes those with trifocals or progressive lenses to bend their necks and backs into less comfortable positions to keep the computer screen in the intermediate area of their lenses, adding neck and back pain to the already bothersome list of symptoms.
By contrast, computer glasses are made specifically to help your eyes focus at this intermediate range, making computer viewing over an extended period of time more comfortable.
Another thing that makes computer viewing uncomfortable, and even potentially sight-threatening in the long run is something called “blue light,” which has been known to cause eyestrain, headaches and fatigue. Recent studies also point to growing evidence that blue light exposure has the potential to increase a person's risk of macular degeneration over time.
Often computer glasses are equipped with special coatings that help cut down on the amount of blue light that reaches your eyes, such as HOYA Recharge, a cutting edge reflective coating designed to reflect around 30% of harmful blue light away from the eye. This makes extended computer use more comfortable and reduces the risk of developing macular degeneration in the future.
Crizal Prevencia lenses help protect your eyes from harmful Blue-Violet light in everyday surroundings including sunlight, indoor lighting, and most digital screens.