"transparent eye structure" . _:b670479285 . _:b670496573 . . "A transparent structure that is part of a visual sense organ, the function of which is to direct or focus light onto a photoreceptor array." . _:b670479285 . _:b670479285 . _:b670496573 . _:b670479285 . . _:b670496573 . . _:b670496573 . _:b670479285 . "lens" . _:b670496573 .