Well, what counts as an eye? When in development does an eye become an eye? If it isn’t complete, is it still an eye? In order to be considered complete, shouldn’t it be able to see? Seems like the eye and sight are two sides of the same coin.

But then again, some people have eyes that can’t see. Sight is both the defining feature of an eye, and also not necessary to define an eye. Maybe our languages aren’t specific enough. Let’s say the capital E Eye is a concept of an organ defined by the fact that it sees, (like how some frogs have rudimentary third eyes on the tops of their heads which just sense light above them) while a lowercase e “eye” is any object which resembles an organ that sees. Then the Eye works in the previous paragraph.