But it evolved into an optical instrument capable of focusing light on to the retina. Once that happened, the effectiveness of the eye as an imaging system went through the roof, from about 1 per ...

Optical illusions occur because of the way our brain processes visual information. The human vision system is complex but ... makes them develop a keen eye as they can read spots on MRIs, and ...

A group of scientists might have discovered a new color thanks to a unique retina stimulation technique that targeted specific photo receptors in the eye.