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Abstract Most people are familiar with two basic types of eye: the simple or camera-like eyes of vertebrates and the compound eyes of insects. However, over the last twenty years the list of optical mechanisms known to be used in different eyes has nearly doubled, in particular by the addition of several kinds of system based on mirrors rather than lenses. This article attempts to bring together old and new work on the diversity of image-forming mechanisms in animals.
Michael F. Land (Thu,) studied this question.