Bi-Focal's built into the high quality CR-39 lenses. Polarized lenses with reading inserts. This is a great low cost alternative that allows you to benefit from a full coverage polarized sunglass with reading lenses. Because 100% polarization kills reflected glare and reduces eye strain, the lenses are ideal for reading close up and seeing in the distance. Great for hiking, fishing, driving, or lounging at the beach or pool.
