For a little Vistar vision fun, we rounded up a couple of cool facts about the eyes.

First, the muscles of the eye are the most active muscles of the body. That may seem surprising when you think about all the walking, waving, sitting and moving you do in a day, but just imagine doing that without blinking or shifting your eyes!

Another cool fact about eyes is that an ostrich’s eye, which measures almost 2 inches across, is the largest eyeball of all land animals. But don’t be too impressed. This bird’s eye is actually bigger than its brain!