Product Code: IMCG301

Why need PVD coated lens:

For a simple lens, the total light loss from reflection is maybe 7%, which is to say that about 93% of the light actually makes it through the optic. No biggie.

Consider what reflective light loss would mean for a four-element optic, just as illustration. The fraction of transmitted light would be 0.93 x 0.93 x 0.93 x 0.93 = 75%. Today’s zoom lenses might have 10 to 20 glass elements, and, lacking coatings, only 48% of the light would make it through to your sensor—a loss of more than one f/stop. More elements, more loss.

Despite the appearance of your lenses, these layers are actually colorless, and usually made of magnesium fluoride. But they’re very thin. Indeed, they are 1/4 the wavelength of the light whose reflection is to be mitigated. They also have to be intermediate in refractive power between glass and air.

So imagine a ray of light impinging on a coated lens. Some of that light is reflected from the coating, and additional light is reflected from the glass beneath the coating (because the coating and the glass have different refractive power). But the ray subject to the second reflection travels farther: an extra 1/4 wavelength coming in, and an additional 1/4 wavelength going back out.

The total extra path length from the second reflection relative to the first is 1/2 wavelength. That’s 180 degrees of difference, and the two rays cancel out! Like magic, all the light of that wavelength passes through the lens.

While this clearly eliminates the reflection loss, it does so only for one wavelength. But additional coatings can address the problem for other colors, and the best multicoated lenses will have reflections that have been cut to under 1% from deep red to deep blue. That’s greater transparency.

Product Code: IMCG302

Why need PVD coated glasses lens:

The types of lenses you choose can make a big difference in the quality of your eyeglasses. Depending on what your eye doctor advises, some people can get along just fine with basic plastic CR-39 lenses, while some may want to consider thinner and pricier polycarbonate or high-index types, which may be more appropriate for stronger prescriptions.

Then there are the frames: square or round shaped? Wire or plastic? Aviators or Audreys?

But once you’ve picked frames and lenses, there’s a wide variety of lens coatings to consider, each with its own properties—from light reduction to scratch resistance.

Some of these are strictly cosmetic, but depending on your vision needs, others may “potentially improve your comfort and safety,” says Andrew Iwach, MD, clinical spokesperson for the American Academy of Ophthalmology (AAO).

Product Code: IMCG303

Why need PVD coated sun glasses lens:

Polarized Lenses:

Whether you love being on the water or in the snow, reduce sun glare and reflection with polarized lenses. Increase visual comfort  and shield your eyes from UV rays.

Gray Tint

Gray sunglass lenses are a very popular lens tint because they are suitable on both cloudy and sunny days. They are a perfect choice for outdoor activities, including cycling, and active sports. And for nature lovers, gray lenses have the added benefit of allowing the color of objects to be seen in their purest form. 

Brown

Brown  sunglass lenses improve contrast, making them ideal for driving and activities where distance needs to be judged. You’ll benefit from your brown or amber sunglass lenses in sunny conditions to comfort your eyes and heighten contrast against green landscapes and blue skies. Think of putting on this pair when you’re on the putting green or sailing on the deep blue.