There are small color sensing granules known as cones in the nerve cells of our eyes. Color blindness is caused when these granules or pigments are missing. Color blindness is more common in men than ...

Addressing an underlying cause may help restore a person’s ... In children, signs of color blindness may include: a lack of interest in coloring regularly using the wrong colors when drawing ...

Here's what this number seven looks similar to for someone with a more common color blindness ... When a medication or disease causes colorblindness, getting the underlying problem treated ...

Color-blind people may have difficulties judging traffic lights or determining if food has gone bad. This video illustrates how people who are color-blind see the world. For the video, we used ...

Severe keratitis can cause ulcers, damage to the eye and even blindness. The most common type ... cones and 120 million rods ...

A mutation in a gene called NMNAT1 can cause a form of inherited childhood blindness called Leber congenital amaurosis, said researchers, including those from Baylor College of Medicine, in four ...