My glasses run about $500 a pair, and it seems like they get more expensive with each purchase. A good pair of sun glasses is really a necessity; especially after reading all the studies that link eye conditions like age related macular degeneration, cataracts and glaucoma with NOT protecting your eyes from UV light. It is also quite necessary for drives of any length if it is sunny outside. In the past I have purchased prescription sun glasses or transition glasses that change with the light into sun glasses. The prescription glasses are just as expensive (or more!) as my regular glasses. The transition lenses add even more expense to the cost of my glasses and are worthless for driving... They don't change if you are behind glass like a windshield! Transitional lenses also take quite a long time to transition back if the weather is cold.I bought these Over the Glasses (OTG) sun glasses as an attempted alternative to high cost and performance issues with prescription or transitional lenses. I really was not expecting much in the way of comfort with the OTG sunglasses... I expected them to be bulky, heavy, and that they would not stay put on my face. But they are not expensive, and I figured... Why not try them?What I found is a solution to my sunglasses needs that is in-expensive, works well, fits my face, is light weight, stays put, does not either feel or look bulky.... What's not to like! This is the perfect solution for everything except maybe strenuous sports (and I have not tried the OTG glasses in that capacity yet...). I HIGHLY recommend these Over the Glasses Sunglasses.A bit on ordering... Be sure to go to the company's web site to select what frames are compatible with your glasses. The company has quite a few types of frames to choose from, but you want to make sure that your glasses frame will fit inside the OTG frame. To aid in the fit, there is a download you can print out with all the frames they sell that is to scale. To make sure that the scale is right in your printing process, there is also a quarter sized circle on the first page of the print out; just put a quarter on the circle and it should just cover it. Now you just put your glasses, lenses down, over the shapes on the pages and if your glasses fits within a frame, then it is compatable with your glasses! Pretty simple.If you are looking for an alternative to the high cost of prescription sh glasses, this is it! Buy a pair!