What is Color Blindness & How to Test for Color Blindness . There are small color sensing granules known as cones in the nerve cells of our eyes. Color blindness is caused when these granules or ...

Medindia’s Color Blindness Calculator/Color Blindness Self-Assessment test is a screening assessment tool based on Ishihara chart, a simple and most prominent tool to diagnose color blindness ...

People who are color blind might see only a field of spots. These elegant, deceptively modern drawings were published 100 years ago by a Japanese ophthalmologist, Shinobu Ishihara.

Ishihara color test. This checks for red-green color blindness. The doctor will ask you to look at a series of circles (also called plates) with dots of different colors and sizes.

Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20. Contrast sensitivity concerns a different but equally important part of vision.

VideoA confession: I am color blind. It's not that I can't see any colors—I had actually lived most of my life without being a bit aware of my condition—but when I'm presented with one of ...

The test consists of pattern of dots which form a number or shape clearly visible to those with normal color vision. But the pattern is either invisible or difficult to see for those with color ...