What type of organ is the eye?
Eyes are organs that detect light, and convert it to
electro-chemical impulses in neurons. The simplest photoreceptors
connect light to movement. In higher organisms complex neural
pathways exist that connect the eye, via the optic nerve to the
visual cortex and other areas of the brain. Complex optical systems
with resolving power have come in ten fundamentally different
forms, and 96% of animal species possess a complex optical system.
Image-resolving eyes are present in molluscs, chordates and
arthropods.