G7: In Focus: Color Blindness

Contains a variety of information, including several tests for color blindness.

Most of the time, color blindness makes it hard to tell the difference between certain colors.

Color blindness can happen when one or more of the color cone cells are absent, not working, or detect a different color than normal.

For most colour blind people their condition is genetic, usually inherited from their mother

Click on the slide links to experience what it's like being color blind.

Wearing a colored filter over eyeglasses or a colored contact lens may enhance your perception of contrast between the confused colors.

Researchers at the University of Washington have developed gene therapy that restores the gene that codes for the missing or faulty light-sensitive pigment, allowing cone cells to detect colors that they could not detect previously.

The new treatment being tested uses an injection of a virus — a virus that doesn't make humans sick — to get the genes into the cone cells of the retina.

One claim on the company's website was that their glasses "are designed to improve the everyday experience of color vision." STudies do not support that claim.