Disclosure: I received this product as a free sample for review purposes. If you wear prescription lenses and race triathlons, you already know the headache of finding sport sunglasses that actually work for you. It's a surprisingly underserved corner of the market. Most mainstream sport eyewear brands design their frames for people with perfect vision, and if you need correction, you're often left choosing between expensive custom solutions, clunky clip-on inserts, or just squinting your way...