Analagous Structures

My eye is an example of an analagous structure because the human eye is very similar to the eye of an octopus, other than the fact that we have a blind spot and they don't. However, the octopus and human eye are not closely related and are on two different branches of the tree of life. This means that they are analagous structures because the eyes function the same in both species but they evolved independently of another and are not descended from a common ancestor.