Eye

The eye is a seeing organ. There are multiple models for the human eye. The eye has a lens and a retina. The retina is largely a flat but curved surface that has little depth. The retina is the image sensor of the eye.

Eyes connect to the brain using the optical nerve.

The optical center of the eye is not the same as the rotational center, giving rise to ocular parallax, which has been accounted for by some researchers who have built an eye tracking system to automatically change the rendering of a VR scene slightly according to someone's gaze.