👉 Purblindness is a medical condition in which an individual has difficulty seeing colors. This can make it difficult to distinguish between different shades of light, such as red and green, due to the lack of vision in their eyes. Pupillary responses are also affected, meaning that they cannot see the pupils or the colored areas on the retina, making it harder for them to perceive color accurately. In extreme cases, purblindness can cause blindness.