Colour blindness, or colour vision deficiency, makes it difficult for individuals to distinguish certain colours due to issues with the eye’s colour-detecting cells. It can be inherited or acquired later in life and is more common in men. Red-green and blue-yellow colour blindness are the most prevalent types. In daily life, it can lead to challenges such as difficulty with traffic lights, maps, and clothing selection, as well as impacting social interactions and self-esteem.