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 ...

Medically reviewed by Andrew Greenberg, MD Key Takeaways Pupils naturally dilate in low light to allow more light into the ...

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 ...

A novel ophthalmic spray containing 1% tropicamide and 2.5% phenylephrine was noninferior to traditional eye drops for producing changes in the maximum pupil diameter and percentage of pupillary ...

Our eyesight declines with age and poor lighting or strong contrasts between light and dark can limit the ability of older people to react in everyday life, resulting in a negative impact on the sleep ...

His gaze softens as he draws closer to you. With one hand around your waist and the other cradling your jaw, he pulls you in. You look into his eyes, and notice his pupils have grown large and hungry.