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Most non-primate mammals do not have specialized photoreceptors for the medium-wavelength band. Most primates do.

There is a distinction between two different kinds of bats: megabats and microbats. Megabats differ in size (generally), but also in the organization of their visual system. In particular, their retinotectal projections are different: while all of the retinotectal projections in microbats are contralateral, retinotectal projections in megabats are divided such that projections from the nasal part of the retina go to the ipsilateral SC and those from the peripheral part go to the contralateral SC. This is similar to primate vision.

In primates, retinotectal projections to each SC are such that each visual hemifield is mapped to one (contralateral) SC. This is in contrast with retinotectal projections in most other vertebrates, where all projections from one retina project to the contralateral SC.