They are the glasses that allow angels to appear next to each twinkling light. I still have my old pair from the years the Lights went up on Residential Street.
Back then, on Residential Street, the Lights were spaced far enough part that, when wearing the glasses, angels appeared next to each and every light. We still take them out during Christmastime at our house and look at our tree and see the angels next to every light.
When the Lights moved to The City (BIG MISTAKE) the glasses were not part of the show for the Guests. Guest Relations had said it was because the lights had to lay so much closer together on the facades so that they could all fit. As a result the angel effect would not work b/c the lights were so very close together, it caused a blurry effect.
I'm glad something was done to bring the glasses back, but wonder why they are only for AP holders (which I am one) when they were FREE for ALL guests back in the glory days of Residential Street, the far superior show.