Under-eye filler, also called tear trough filler, can help correct dark circles in the right patients. But here's what experts want you to know first.

A retinal tear is when a layer of cells at the back of your eye ruptures. Detachment is when the retina separates from the back of the eye. Both are emergencies.

A retinal tear is a rip in the layer of light-detecting cells at the back of your eye. It’s an emergency that can lead to permanent vision loss if not treated quickly.