CALVIN KLEIN CK18513

1.5 Index Basic Lenses (FT-28) Our standard bifocal lenses; works best for low prescriptions ranging from -2.75 to +1.75. For higher prescriptions we recommend that you upgrade your lens package.

1.59 Index Bifocal Lenses (FT-28) Our standard bifocal lenses; works best for low prescriptions ranging from -2.75 to +1.75. For higher prescriptions we recommend that you upgrade your lens package.

1.6 Index Thin and Lite Bifocal Lenses (FT-28) Up to 25% thinner than the basic 1.5 index lenses, a great choice for prescriptions ranging from -8.00 to +6.00.

High Index 1.74 lenses are the thinnest and flattest lens. These ultra thin lenses are nearly 50% thinner than plastic and 5% thinner than 1.67 high index lenses. Good for prescriptions over +/-8.00