High Index 1.67 Asp UV420 Blue Light Blocking Hmc EMI Photochromic Optical Eyeglasses Lens

1.67 high index lens is particularly useful for those people with higher prescriptions. These high index lenses are manufactured with an aspheric surface design resulting in a flatter front curvature and a remarkable reduction in center thickness, edge thickness and weight by up to 30% compared to 1.50 index. Ideal for all frame types.

The Benefits of Blue Cut Lenses

Blue Cut Lenses is to block and protect your eyes from high energy blue light exposure. Blue cut lens effectively blocks 100% UV and 40% of the blue light, reduces the incidence of retinopathy and provides improved visual performance and eye protection, allowing wearers to enjoy the added benefit of clearer and sharper vision, without altering or distorting color perception.

What is Photochromic Lenses?

Photochromic lenses typically will not darken inside a vehicle because the windshield glass blocks most UV rays. Recent advancements in technology allow some photochromic lenses to activate with both UV and visible light, providing some darkening behind the windshield.


Single Vision lens: index 1.499, 1.56, 1.61, 1.67, 1.74 and 1.59 PC

Bifocal lens: index 1.499, 1.56 and 1.59 PC

Progressive/Multifocal lens: index 1.499, 1.56 and 1.59 PC

Photochromic lens: index 1.499, 1.56, 1.61, 1.67 and 1.59 PC

Blue Block lens: index 1.499, 1.56, 1.61, 1.67, 1.74 and 1.59 PC