I came to gush about how neat the way that our brain utilizes our eyes to perceive our world, however it appears that I am a post early!
Speaking directly to the anatomy, we dissected cow eyeballs and I was most shocked by how hard and thick the lens of the eye is; I always thought of eyes as squishy. Man I don't miss learning muscles and their insertions though haha
Haha you're right! Nothing worse than rote learning this stuff for the first time. But once you've got it down it feels great!