Airplanethings.com doesn't go to OSH that I know of.
Actually they don't advertise much at all......
Have visited ALL the sunglasses vendors at OSH and they all want to ignore the need for clear lenses at the bottom for better visibility in the shaded cockpit. Maybe, by now, some have figured it out....
..So, maybe it wasn't Airplanethings at OSH... But
I am sure some Chinese manufacturer sells the exact same glasses to various vendors.. I have them sitting right here in front of me and sure as heck the top are tinted and the 1.5 reading section is clear at the bottom... And the invoice for 21.95 $ says I got them in 2009 at OSH...