THINNER LIGHTER LENSES

If you would like your lenses to be thinner and lighter, then you should choose high-index lenses. High-index lenses are made of a special material that refracts light in a different way than regular lenses. With high-index lenses, vision can be corrected with less material, making the lens much thinner.

Nearly everyone can benefit from thinner, lighter lenses. High-index lenses can be up to 50% thinner than regular glass or plastic lenses and they're usually much lighter too.

Though these lenses are especially beneficial if you have a strong prescription, they can make a noticeable difference in the appearance of virtually any pair of glasses.

Various high-index lenses are available today in different price points based on how much thinner they are compared to regular plastic lenses.

The lenses are classified by their 'index of refraction' (or 'refractive index').

Generally, lenses with a higher index of refraction will be thinner (and usually more expensive) than lenses with a lower index.
The refractive index of regular plastic lenses is 1.50. The refractive index of mid to high-index plastic lenses ranges from 1.53
to 1.74.  Those in the range of 1.53 to 1.59 are about 20% thinner than regular plastic lenses, whereas 1.74 high-index lenses
are about half the thickness of regular plastic lenses.

Most popular lens designs (single vision, bifocal, varifocal and photochromic) come in high-index materials and we will advise
you which lens is available in your prescription.

Note: As high-index lenses reflect more light than regular plastic or glass lenses, an anti-reflective (AR) treatment is highly recommended for these lenses.