Spider eyes Simple eye in invertebrates
this jumping spider s main ocelli (center pair) acute. outer pair secondary eyes , other pairs of secondary eyes on sides , top of head. head of wasp 3 ocelli (centre), , dorsal part of compound eyes (left , right) spiders not have compound eyes, instead have several pairs of simple eyes each pair adapted specific task or tasks. principal , secondary eyes in spiders arranged in 4 or more pairs. principal eyes have moveable retinas. secondary eyes have reflector @ of eyes. light-sensitive part of receptor cells next this, direct , reflected light. in hunting or jumping spiders, example, forward-facing pair possesses best resolution (and telescopic components) see (often small) prey @ large distance. night-hunting spiders eyes sensitive in low light levels large aperture, f/0.58.