These are crazy! I was messing around with a couple odd pieces of glass and look at these 'eyes'! The little bubble is from poking the hot glass with a tool and then putting clear glass over it. An easy way to have a cute little accent in a dot. The heat and glass worked together, reacted, and these dots make me think of eyes with the variations of color and depth. It's always fun to melt glass because the fun just doesn't end!