Why do we close our eyes when sleeping?

Most humans and animals close their eyes during sleep. The reasons are not fully understood, but two important factors include:

To avoid distracting sensory stimuli (lights, noises, etc.) can interfere with your ability to fall and stay asleep, closing your eyes blocks out almost all visual stimulus.

Closing your eyelids protects your eyes from drying out, and from being damaged by foreign objects.

WELL IF U STILL WANT,U CAN TRY TO SLEEP WITH OPEN EYES. I AM SURE THAT U WILL GET YOUR ANSWER.

Sleep or sneeze? Sleeping - to keep lint out. Sneezing - to keep your eyes in. If you hold your nose, keep your mouth shut and make as if to blow out of your mouth, you will feel the pressure behind your eyes. Same thing

sneezing and sleeping are two different things

well you close your eyes when you sleep because thats what the body is comfortable with

also its a way of relaxing your eyeballs which are active all throughout the day

Dear Akshya if u have asked scientific reasons let us put it this way :

The body organizes itself to accomplish specific tasks at set intervals within the 24-hour day. Darkness is the preferred time for sleep and rest. Our body prepares for sleep by orchestrating a complex set of physiological changes that favor wake activity in daytime and sleep at night in a rhythmic manner. This includes modulation of hormone and neurotransmitter levels (i.e. body temperature, blood pressure, heart rate, and cellular events of varied complexity). The net results is physiological support of the sleep process as our daytime activity ends. Sleep induction is also favored as our sleep debt reaches a significant level after about 16 hours of wakefulness. The merging of our sleep debt pressure with physiological support of sleep results in a strong sleep urge at bedtime.

The things which make us close eyes are that In every brain there is a core of neurons in the lower brainstem that is necessary for vital functions such as breathing, sleeping, and wakefulness referred to as the reticular formation. Destruction of this tissue will result in a permanent comatose condition. This collection of neurons is referred to as the waking center of the brain. Stimulation of the waking center arouses from sleep and prevents sleep onset. Sleep requires that we minimize sensory stimulation because it drives the waking center of the brain and postpones the normal drive for sleep onset. For this reason, we seek a quiet, comfortable, and dark environment and a disengagement from energetic activity or stress.Good luck for sound sleep.

you must've completed your colege days or you must be doing it, When a lecturer's taking a class will you be able to look @ him??? So you close your eyes when yu sleep in classroom and it becomes a habit as you continue to do the same during the night hours when you sleep...;)

good question i think while one sneezes all the system for that moment comes to a stand still i do not know what to say this term medically

you are talking about sneezing and asking about sleeping, sort of unrelated.

Also, while sleeping I don't close my eyes, so dont say we at me!

u close ur eyes while sleeping to relax them and keep them moist whereas u close ur eyes while sneezing because sneezing is an involuntary reflex action.......wn it happens ur eyes automatically gt close to protect thm 4m any harm....

relfex and design for safety precautions all the money in the whole world could never be able to create the simplest life form

Because we dream at night.

Your 80% of energy is in eyes.

When we sleep this energy is transformed to take us in unconcious world of dreams.