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 ...

Consumer & Gadgets

Women's health on show, a little, at CES

Among the more than 3,500 booths at the Consumer Electronics Show (CES) in Las Vegas, only a few focus exclusively on women's health, including a cervical cancer screening device and a wristband to anticipate hot flushes.

Robotics

Do robots have to be human-like for us to trust them?

Recently published research assessed human trust when collaborating with eyed and non-eyed robots of the same type. The data suggest that humans might not need human-like machines to trust and work with them. Instead, they ...

Machine learning & AI

Everyday AI: How artificial intelligence is shaping sports

The hush of anticipation. The pop of a perfectly centered racquet hitting the ball. The sharp squeak of shoes scuffing against the court. These are the unmistakable sounds of a tennis match. We know them well. But could you ...

page 2 from 11

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