Researchers previously believed contrast sensitivity function -- the minimum level of black and white that a person needs to detect a pattern -- was mainly dictated by the optics of the eye and ...

The objective is to determine the characteristics of contrast sensitivity of the human vision system (HVS) by experimental measurements employing a CRT. Said characteristics form the basis for the ...

It is often difficult for a driver to see a person walking on the side of the road at night--especially if the person is wearing dark colors. One of the factors causing this difficulty is a decrease ...

Impaired vision and blindness are common. About 3.4 million people in the US are blind or visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20 ...

Across the entire animal kingdom, visual images are processed by two major neuronal pathways that extract light and dark stimuli from visual scenes – ON (light on) and OFF (light off) pathways. Light ...