Pinpoint pupils occur when the pupils shrink to a small size. This can be due to various conditions and medications, such as prescription opioids, hypertension medications, and eye inflammation. In ...

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. Pupils, or the ...

You look in the mirror and notice that the dark circles in the middle of your eyes are bigger than usual. What's going on? Those dark circles are your pupils, the openings that let light enter your ...

Dilated pupils (mydriasis) occur when the pupils open larger than usual. This normally happens in darker lighting to allow more light into the eye, but dilated pupils can also indicate an underlying ...

The size of your pupils varies throughout the day, but most people’s pupils fall within a particular size range. We’ll look at when and why your pupils change size. First, the range of “normal” pupil ...