I had a bad experience with Randolph Rangers. They were non-prescription but had the worst distortion in the lenses I have ever encountered. I gave them away.
Just my experience, other's mileage may vary.
You are the only guy that I've ever heard say that out of dozens and dozens of happy customers. You should have sent them back. They can immediately measure distortion and determine if you got some perscription lenses by mistake. I have both prescription and neutral lenses that have been superb - not to mention saved my eyes when an action blew up.
It was an unusual situation. I had a set of HiDefSpecs, which later became Pilla. I was shooting registered NSCA tournaments pretty heavily and left my set somewhere, carelessly, and lost them. When I bemoaned my carelessness to a shooting buddy he told me that someone had left a zippered set of glasses in his cart at a shoot, and that he couldn't determine who, and I could have them. I accepted, tried them at a casual round of clays with him and some other buds, and found the distortion so bad that I abandoned them on about station 5 and gave them back to him. I would have felt dishonest had I sent glasses back to the company, for replacement, that I hadn't bought. Those were the glasses I mentioned earlier.
I suppose , in retrospect, they could have been prescription (with a very "mild" correction). I had just always assumed they weren't, as they did not seem to be at the time. However, from here on out I will adjust my evaluation of them to accommodate that possibility.
