wink
It means you have one eye open. If you mean the idiom "sleep with one eye open," it means that you are staying alert at all times in case of disaster.
no
I believe a shark sleeps with one eye open.
One of its eyes may be hurt or it may have pink eye
This is completely natural behavior. When a gerbil opens their eyes, they often only open one eye at a time. In a few days the other eye will open.
It is a wink.
it is on one side of face
No. The mouse is perfectly normal. Some times the eyes open at different times. It's all good though
A dolphin
Don't worry, its completely normal if he does this sometimes. if he is constantly doing it, consult advice from a professional. He should open his closed eye once you get his attention- if this is the case, don't worry. If he is unable to keep both eyes open at the same time then he could have some eye muscles week or possibly a disease in the brain. Any other animal inquiries? Contact me :D
One of the most common types of eye operations or surgeries is the LASIK eye surgery. In this operation the human eye is cut open. One may find videos of this or other operations on YouTube.
they can sleep long with one eye open -they'll drown if both are closed also their eye is open to sense danger or they'll die.