Standard (1.5)
Standard lenses are CR-39 plastic lenses with an index of 1.5 – which work best for low prescriptions ranging from -2.00 to +2.00. If your prescription is above +/-2.00, we recommend that you upgrade your lens.

Thin & Light (1.56 High Index)
With a high index of 1.56, Thin & Light lenses offer the best value for people who have moderate prescriptions and want a light lens that is 30-50% thinner than standard plastic lenses. It’s the best choice for prescriptions ranging from -4.00 to +2.00.

Super Thin (1.6 High Index)
Super thin lenses are more than 50% thinner than our standard lenses at an index of 1.6 and are great for people with moderate-to-high prescriptions. These lenses are recommended for prescriptions from -4.00 to +4.00 for the best results.

Ultra Thin (1.67 High Index)
Ultra thin lenses are the thinnest and lightest lenses available on the optical market! With an index of 1.67, these are the most cosmetically appealing lenses and are recommended for those with prescriptions of -8.00 to +6.00. For optimum results, add an ultraviolet protective coating.

As Thin as possible
These are one of our high index lenses with a refractive index of 1.74. High index lenses can reduce the thickness of the lenses of high powered prescriptions. At the same time, they make the lenses lighter and more comfortable to wear, eliminating the "bug-eye" look of conventional lenses. These (1.74 index) lenses are recommended for prescriptions of : -12.00 to +8.00