Thinner, lighter high-index lenses are especially recommended if you have a strong eyeglass prescription for nearsightedness, farsightedness or astigmatism. 

We highly recommend high index lenses for any prescriptions over -4.00. 

You are likely to experience notable optical distortion without hi index. This will also reduce the overall weight of the lenses making the frames more comfortable. These lenses are an up-charge of $100 so if you do not have a strong prescription, you do not need to select high index.

Please note that we cannot make high index lenses in Outdoor or Transition lenses at this time.