What are the benefits of having anti-reflective coating?
By Tina on February 17, 2010Add CommentsWhilst anti-reflective (AR) coating helps to make the eye behind the lens more visible, in addition to this they also reduce back reflections of the white of the eye as well as bright objects behind the glasses wearer (e.g. lamps and windows). Such reduction of back reflections increase the apparent contrast of surroundings. At night, AR coatings help reduce the glare from headlamps of oncoming cars, street lamps and heavily lit or neon signs.
Glasses wearers with high index lenses (1.67 and above), should always insist on having AR coating. This may sound like another money spinner, but consider this: an uncoated standard plastic lens reflects 8% of light, whereas an uncoated high index plastic lens will reflect up to 50% more. A rule of thumb is the higher the index, the greater the amount of light reflected. This can lead to increased difficulty with night driving as mentioned above, but also eye fatigue due to decreased light transmittance. With an AR coated lens however, the light transmittance can increase to 99.5%. As a result, reflections and chromatic aberrations are reduced. You will have a clearer view of your surroundings, and the glasses have a better cosmetic appearance.
Now if that was not a reason to spend an additional £10, I don’t know what it!

