Engineering

Researchers 3-D print prototype for 'bionic eye'

A team of researchers at the University of Minnesota have, for the first time, fully 3-D printed an array of light receptors on a hemispherical surface. This discovery marks a significant step toward creating a "bionic eye" ...

Engineering

Contact lens: You blink and you zoom in

Researchers are in the news this week because of their soft biomimetic lens. Blink twice and you get yourself a closer look at things. Activated soft elastomer works to increase focal length.

Hi Tech & Innovation

AI-powered 'sonar' on smartglasses tracks gaze, facial expressions

Cornell University researchers have developed two technologies that track a person's gaze and facial expressions through sonar-like sensing. The technology is small enough to fit on commercial smartglasses or virtual reality ...

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Eye

Eyes are organs that detect light, and send signals along the optic nerve to the visual and other areas of the brain[citation needed]. 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 cnidaria, molluscs, chordates, annelids and arthropods.

The simplest "eyes", such as those in unicellular organisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment.

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