..., there is a marked diversity in the structure and ‘design’ of visual systems, reflecting both the constraints of animals' phylogenetic histories as well as those imposed by their visual environments. Interommatidial angle Micro-computed tomography Eye map Visual resolution Visual ecology Summary...

... – in the compound eye of the fiddler crab Uca vomeris . Using an in vivo pseudopupil method we determined sizes and viewing directions of ommatidia and created a complete eye map of optical and sampling resolution across the visual field. Our results reveal five distinct eye regions (ventral, dorsal,frontal...