A person’s pupils may be of different sizes (anisocoria) for several reasons, including physical trauma, response to light, and infection. The condition may also be present from birth.

Brain injury: A head injury can sometimes cause your pupils to become bigger than normal or two different sizes. If you have a head injury and your pupils change size, you should go to an ...

Wear your seatbelt while driving. If you notice differences in the sizes of your pupils, seek medical attention immediately. Your doctor can help identify and treat the underlying cause of your ...

We’ll look at when and why your pupils change size. First, the range of “normal” pupil sizes, or, more accurately, what the average is. Pupils tend to become bigger (dilate) in low-light ...

Is it possible to have more than one pupil? What about two pupils that are different sizes? The answer is yes – and these are ...

Bowie had a condition called anisocoria - which meant his pupils were different sizes. This gave the illusion of a difference in colour, explains Kevin Hunt, senior lecturer in design and visual ...