tarsal gland secretions
Tears produced by the lacrimal glands help prevent the eyelids from sticking together when the eye closes. These tears create a thin layer of moisture on the surface of the eye and eyelid, allowing for smooth and comfortable blinking.
Van der Waals forces tend to bring nanoparticles close together, causing them to stick. To prevent this, nanoparticles are often coated with molecules that repel each other, such as polymers or surfactants. This coating provides a barrier that prevents the particles from coming into contact and sticking together.
It is believed that the eyes close when we sleep because having the eyelids closed prevents the sclera and cornea from drying out or becoming accidentally scratched, and also prevents oxygen diffusion from the inside of the eyelid to the sclera and cornea.
Smooth muscles
your eyelids.
They can not. They do not have 'eyelids'.
Snakes cannot close their eyes - they have no eyelids.
Repel is a verb that means to push or keep something away. It can also refer to a substance or device that prevents something from getting too close or sticking to it.
A snake does not have eyelids so it cant close its eyes .
Yes
*Can you see
Yes, platypuses do have eyelids. They close their eyes when underwater, hunting by using the special sense of electroreception in their bill.