Blue cone monochromacy is caused by lack of functionality of L (red) and M (green) cones, and is therefore mediated by the same genes as red–green color blindness (on the X chromosome).

May 26, 2021 · Get the facts on red-green color blindness. How does it work, what does it look like and how do people deal with it?

Color blindness (color vision deficiency) happens because special nerve cells in your retinas are missing or don’t work properly. This makes you see some colors differently than usual. Most …

Aug 25, 2025 · Individuals with red-green color blindness perceive a limited or altered palette where distinctions between certain colors are difficult. The primary challenge is distinguishing …

Aug 7, 2023 · Different types of color blindness cause problems seeing different colors. Read about red-green color blindness, blue-yellow color blindness, and complete color blindness.

Color vision deficiency is the inability to distinguish between certain shades of color. Most people with color vision deficiency can see colors, but they have difficulty differentiating between …

Oct 27, 2025 · Color blindness can make it hard to tell certain colors apart, like red and green. Light and dark affect how people with mild color blindness see colors. What color-blind people …

Apr 16, 2025 · There are three main types of color blindness, also known as color vision deficiency. Keep reading to learn about the different types and their causes.

Jun 13, 2025 · Red-green color blindness is usually an X-linked genetic condition, caused by mutations in genes known as OPN1LW and OPN1MW. Since males have only one X …

Those with red–green color blindness may see the number "21" or no number at all, with the green and red hues appearing much more similar, if not indistinguishable. Congenital …