why is that the eye of the octopus and mammals come under analogous structure when its basic structure is same? If brains of fish and mammals can come under homologous structures because of its basic structure then why not the eye?

why is that the eye of the octopus and mammals come under analogous st

1.	why is that the eye of the octopus and mammals come under analogous structure when its basic structure is same? If brains of fish and mammals can come under homologous structures because of its basic structure then why not the eye?
Answer» why is that the eye of the octopus and mammals come under analogous structure when its basic structure is same? If brains of fish and mammals can come under homologous structures because of its basic structure then why not the eye?