Types of colour blindness
Colour blindness occurs due to the absence or malfunction of certain colour-detecting cells in the eye, known as cones. However, there are several types of colour blindness:
Red-green colour blindness
This is the most common type of colour blindness and can be further divided into two types: protanopia, which involves an absence of red cones, and deuteranopia, which involves an absence of green cones.
People with red-green colour blindness may struggle to distinguish between reds, greens, and oranges, which can impact activities like choosing ripe fruits and reading traffic lights.
Blue-yellow colour blindness
Also known as tritanopia, this type of colour blindness is less common and affects the blue cones in the eye. Individuals with this condition have difficulty distinguishing between blues and yellows, as well as greens and pinks.
This type of colour blindness can affect tasks like reading maps and working with digital displays.
Complete colour deficiency
Achromatopsia is a rare condition where individuals see no colour at all, perceiving the world in shades of gray. It can also cause light sensitivity and blurry vision. It occurs when none of the cone cells function properly, and it significantly impacts daily life.
