I recently had corrective eye surgery [PRK], and my eye doctor said I need to find a pair of polarized sunglasses to protect my eyes from UV light. (During the healing process, it's extremely important to protect your eyes from UV so the cornea's don't become scarred).  Searching for sunglasses is a nightmare!  Prices range from hundreds of dollars to just a few dollars.  I wanted polarized and HD and found these glasses on Amazon.  I'm a prime member, but these weren't eligible for 2 day shipping, however, shipping was free through the company.  Much to my surprise, the day after I placed the order, I got them!  FANTASTIC!  They are everything I was hoping for!  GREAT sunglasses!