A new study suggests that never-seen-before stem cells in the human retina can restore vision in mice with a common eye disorder. But more work is needed to translate the treatment to people.

Swelling under the eye can develop for various reasons, from mild conditions, such as allergies or blocked tear ducts, to more severe conditions, such as organ failure. If a person has swelling ...

Medications, trauma, and medical conditions can lead to abnormally small pupils (miosis). In miosis, the pupil is smaller than it should be, even in darkened conditions when it would typically expand ...