In some people, the ability to perceive colours is different than what most of us see and is referred to as a colour vision deficiency. When this deficiency is severe, it is referred to a Colour Blindness.
There are three main kinds of colour blindness, based on photo pigment defects in the three different kinds of cones that respond to blue, green, and red light. Red-green colour blindness is the most common, followed by blue-yellow colour blindness. Sometimes colour blindness can be caused by physical or chemical damage to the eye, the optic nerve, or parts of the brain that process colour information.
Men are much more likely to be colour blind than women because the genes responsible for the most common, inherited colour blindness are on the X chromosome.
There are a number of diagnostic techniques to check on Colour Blindness, Ishihara Colour Test being the most common for red-green colour blindness. The test consists of a series of coloured circles, called Ishihara plates, each of which contains a collection of dots in different colours and sizes. Within the circle are dots that form a shape clearly visible to those with normal colour vision, but invisible or difficult to see for those with red-green colour blindness.
Although, there is no cure for colour blindness, there are effective mechanisms to manage the condition. People with red-green colour blindness may be able to use a special set of lenses to help them perceive colours more accurately. There are Visual aids available that can also help people cope with colour blindness. Colour blindness can make it difficult to read colour-coded information such as bar graphs and pie charts.
If you think you have Colour Blindness, do contact us at Aayush Eye Clinic in Mumbai to understand how you can manage the condition with minimal impact to day-to-day life.