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Mike

Plastic and polycarbonate eyeglass lenses?

is the polycarbonate lenses have less reflection/glare than the plastic?
03/11/2015

Answers (3)

  • Michael anderson

    The formula for reflection off of a clear material includes the index of the material. The higher the index, the more reflection. Diamonds are among the materials that have the highest index of refraction. accounts for their brilliance. Poly has a somewhat higher index of refraction than CR-39 so more reflections would be expected from Poly.
    03/11/2015
  • Benji

    All eyeglasses lens are able to reflect some light, reducing the amount of light that enters the eyes to form visual images. In this way, it can affect your vision, especially under low light conditions, for example, driving at night. Moreover, lens reflections also cause glare, further reducing vision in these situations. Generally, the amount of light reflected from eyeglasses lenses depends on the lens material. Plastic lenses reflect about 8 percent of incident light, so 92 percent of available light enters the eye for vision. Thinner, light high index lenses such as polycarbonate lenses reflect up to 50 percent more light than Regular glasses or plastic lenses. So they can cause problems with glare unless something is done to reduce reflections.
    03/13/2015
  • jill

    The amount of light reflected from eyeglass lenses depends on the lens material. Conventional glass or plastic lenses reflect about 8 percent of incident light, so only 92 percent of available light enters the eye for vision. Thinner, lighter high-index lenses reflect up to 50 percent more light than regular glass or plastic lenses and therefore can cause more problems with glare unless something is done to reduce reflections.Anti-reflective (AR) coating reduces lens reflections and allows more light to enter the eye for better night vision. Regardless of the lens material, eyeglass lenses with AR coating transmit more than 99 percent of available light to the eye.By eliminating surface reflections, anti-reflective coating also makes your lenses nearly invisible. This greatly improves the appearance of your eyewear and allows others to see your eyes, not the reflections in your glasses.
    04/13/2015
Jumpto

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