Cows eye dissection?

Question

before we dissected it, the pupil was in the middle. we sketched a diagram and around the pupil was a layer of black stuff. what is that?

thanks

and what does it do?

Answer 1

don't know exactly what you are talking about, but here is a labeled diagram of a cows eye (including each parts function) and seeing you did the experiment you will probably have a better idea on what it was.

http://www.exploratorium.edu/learning_st...