The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of

The eye of octopus and the eye of cat show different patterns of structure, yet they perform a similar function. This is an example of analogous organs that have evolved due to convergent evolution.
(2) The evolution of eye of octopus and that of cat is an example of convergent evolution, which occurs when unrelated organisms evolve similar traits in response to similar environmental pressures. Octopus, a mollusc, is an invertebrate and cat, a mammal, is a vertebrate. They are not closely related organisms.
(3) The eye of octopus and that of cat are analogous structures, since they have a similar function (vision) but they do not share a common evolutionary origin. Vertebrate eyes are formed as outgrowths of the brain. The cephalopod eyes form as invaginations of the body surface and, consequently, they lack a cornea.
(4) They are analogous organs that have evolved due to convergent evolution.