Shuron Ltd is based out of Greenville, South Carolina since 1865 and is one of America's oldest eyeglasses manufacturers (if not the oldest). You probably saw their frames on plenty of Hollywood actors' noses, from Kevin Costner in the 1991 JFK movie to Michael Douglas in Falling Down. Furthermore, their Ronsir Zyl frame accounted for half of all eyeglasses sales in the 50's which gives you an idea of how big and prominent Shuron really is. The funny thing, this model is as elegant and appropriate now as it was half a century ago.
Shuron's factory still employs about 80 employees and produces about 10,000 frames per month. According to Charles Whitehill, Shuron's current owner, their secret to longevity is "if it's not broke, don't fix it", which seems to be a pretty effective business model.
So please ditch your $5 dollars drug store glasses and invest in a real pair made by hand from high-quality materials (and that's also backed by a one-year manufacturing warranty against any defects).
See below for models available at Morrison, a Belgium-based store (about 200€ for a pair of sunglasses).
And if you're not willing to take advice from me, take them from the ever stylish Malcolm X.