Heart diseases are the leading cause of death worldwide. While treatment is available, early diagnosis is the best course of ...

Your eyes can predict a heart attack hours before it actually happens: 10 signs to look out for. ENG; ... the rounded tissue over the pupil and the iris. Changing Colors in the Retina.

The look of love. The yellow-bellied toad is sure to win the hearts of even the most hesitant of anuran appreciators, being an adorable little amphibian with heart-shaped pupils.

Opioids usually makes a person's pupils constrict. In the long term, it can lead to long-term damage to the eyes. Learn more.

The medical term for pupils of different sizes is anisocoria. Find out about the possible causes of anisocoria here, as well as when to seek emergency treatment.

Atropine , which treats problems with heart rhythm, stomach issues, and some types of poisoning; Antihistamines, ... How to protect your eyes when the pupils are dilated.

Rayna Bell, a herpetology expert and curator at the California Academy of Sciences, told Snopes it's true that some frogs have heart-shaped pupils, adding that the photo in question appears to be ...