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 ...

Engineering

Exploring biomimetic curved artificial compound eyes

As one of the most successful eye designs in the animal kingdom, natural compound eyes (NCEs) have attracted significant research attention in replicating the anatomical configuration to form biomimetic curved artificial ...

Consumer & Gadgets

New tech addresses augmented reality's privacy problem

An emergency room doctor using augmented reality could save precious seconds by quickly checking a patient's vitals or records. But the doctor could also unintentionally pull information for someone else in the room, breaching ...

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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.

This text uses material from Wikipedia, licensed under CC BY-SA