A color vision test, also known as the Ishihara color test, measures your ability to tell the difference among colors. If you don’t pass this test, you may have poor color vision, or your doctor may ...

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 ...

There are three main types of color vision deficiency: red-green, blue-yellow, and complete. Color blindness, or color vision deficiency, affects the way you perceive color and can make it hard to ...

In order to see the red of a sunset or the green of spring leaves, developing human eyes need to get the right hormone at the right time. That's the finding of a team of scientists who studied how ...

Scientists in California claim to have discovered a new jaw-dropping color no human has ever seen before. The catch? You have to zap your eyes with laser pulses to see it. Five scientists at the ...

Machine vision has evolved to become a fast and reliable tool for quality inspection. In many cases, a machine vision system can perform inspections more quickly and accurately than humans and at a ...