ST. LOUIS — Google searches for "hurt eyes" spiked nationwide on the day of the total solar eclipse on April 8. NASA and doctors across the nation repeatedly warned the public about wearing necessary ...

Normally, a person's pupils naturally widen (or dilate) in low-light environments to allow more light into the eye. However, in a new study, researchers reported that a person's pupils also dilate ...

Medically reviewed by Christine L. Larsen, MD Key Takeaways Medications, trauma, and medical conditions can cause miosis or ...

Q: My elderly cat’s pupils seem to stay dilated, even in bright light. Why? A: In old cats, dilated pupils are often just a sign of a harmless condition called iris atrophy. However, if your cat has ...

Whoever said that getting old isn't for sissies knew what they were talking about. All of us, including our dogs and cats, find that as we age, our bodies just don't work as well as they used to. Eye ...

The iris is a structure behind the transparent cornea of the eye. It has a circular opening called the pupil that changes size in response to the light level. Your pupils are usually the same size as ...

Medically reviewed by Diana Apetauerova, MDKey TakeawaysAnisocoria is when the pupils of your eyes are different sizes.

Vision plays a crucial role in how infants and young children learn and develop. Recognizing signs of eye issues earlier may help diagnose and treat potential conditions before complications arise.

The creation of a bionic eye that mimics the widening and shrinking of the pupil may bring us one step closer towards helping people with certain visual impairments. Light enters the eye via the pupil ...