Cliff was getting a new prescription for his vision and decided to try a few frames at the eye doctor's office. Unfortunately, as much as he loves Kyle, Berna and Sunny, they do like to goof off, especially if there's an extended wait. I imagine that Sunny the raccoon is doing her best Enda Mode impression from The Incredibles and uttering a thickly accented "Dah-ling", which is what is causing Kyle to bust up with laughter. Berna, on the other hand, is perhaps giving some thought into buying a non-prescription pair since she seems to like how she looks with glasses. "They make me look smarter"- she likely is thinking.
I really wanted to put some props into the pic- a small mirror near Cliff, several eyeglass frames displayed on the side walls- just to make it seem more like an optometrist office. But that seemed above my current skill. So this is where I left it.