Yeah it's totally one of the cool uniqueness of Muppet Design. Some Muppet eyes are just glasses like Dr. Bunsen Honeydew or just eyebrows like The Swedish Chef. It's kind of like Scooter and Marvin Suggs having that unique humanoid look to them where their nose and mouth are kind of one in the same sort of. Or how Muppet humans are in great variety of neon colors. I've always loved that aspect of Muppet design. Especially how on The Muppet Show, one in awhile there's whatnots (mostly when it's a villain, pirate, robber type character) there's whatnots with monster eyes. Kind of like some of the whatnots in the musical number "Comedy Tonight" (one of my personal favorite numbers)