As the index of refraction
increases, the curvature needed to produce a specific correction
decreases. The result is a flatter, more attractive, lower
volume, thinner lens than was previously possible.
Higher index materials have given patients, those with
large refractive errors, freedom to choose lens sizes and
shapes, as well as frame styles, that were once unavailable to
When these high index lens materials are used in aspheric, atoric,
or progressive designs and paired with premium lens treatments,
the value to you, the patient, expands dramatically.