Concretions are solid masses forming below the eyelids when something accumulates. It can result in irritation, negatively affect the cornea.
Bacteria can develop in the eyes when you don’t clean off the mascara before sleeping. This can result in vision and eye issues, including blindness.
You might accidentally rub off your eyes while sleeping, letting in the mascara, which can lead to eye irritation.
When you let the mascara remain while sleeping, it can dry out and form clumps, resulting in the lashes falling off. Thus the eye health would be harmed.
The eyeballs are most affected when we don’t remove mascara before sleeping as they are delicate and we might rub our eyes at night which can scratch the cornea.