Why we need to blink our eyes?
607058
we close our eyes to keep them safe from debree and germs eg when you sneeze you automatically close your eyes this is a message from your brain to your eyes telling them that you have sneezed so to keep them closed from germs when you blink it alsokeeps your eyes moisterised \n\ntry to keep your eyes open when you sneeze
722702
The blink rate is associated with the ability of the brain to processes information. For babies, the brain is at a formative state, therefore blink rate is lower. As the brain functions get more formalized, blink rate increases.
395015
Make a conscious effort to blink often when you're looking at the screen.  Every few minutes, break away from looking at the screen and focus on something at a distance.  Get up and walk around every hour or so too.
271416
It is almost impossible for a person to keep their eyelids open during a sneeze, although some rare individuals report having little if any trouble doing so. The reflex of shutting the eyes serves no obvious purpose: the nerves serving the eyes and the nose are closely related, and stimuli to the one often trigger some response in the other.
952518
If you looked into it for a long period of time, you might have some damage; however, if it flashes into your eye briefly, it's nothing to worry about.  By comparison, looking at the sun would be a LOT worse for your eyes.
778297
dont blink either, youll get a violation.
1062060
Actually it's not good for you as excessive rubbing with too much pressure can cause your eyeball to change it's shape resulting in vision problems (even just a slight change in the shape can cause this).  Why do some people's brains make drugs, alcohol, or cigarettes feel good?  Not real sure there is an answer for that.  My guess, because we as human beings naturally tend to like things that aren't all that good for us.  Especially when we know it isn't good for us.  LOL.  Or it could be that rubbing them causes your eyes to produce more tears thus clearing debris (bacteria, dirt, etc) that is irritating the eye out of the eye.  Just a guess.\nOh and your eyes have a natural defense against most bacteria/fungi that would get into your eyes (tears, which are used to flush these things as well as others from your eyes.  If I"m not mistaken your tears are slightly acidic which kills a lot of organisms that would get into your eyes.  I might be wrong on that though, they might be slightly basic.  Whatever, the pH level of your tears has something to do with it)  That said, it is a good idea to wash your hands before touching your eyes or any other part of your face.
504075
My guess it's a response to stress.  Sight is the main sense in people lucky enough to have it and we rely too much on it.  If shocked, it might be good to have a clear sight in case something comes your way (imagine you're a caveman and big sabertooth cat is cominagetcha)
708397
The lazy eye, usually has weaker vision than the "good" eye\n\nAs such, it relaxes, and your body forces you to use the good eye.\n\nExercises will help, but it wont really ever go away. It happens after you work out, because you are tired, and the body tends to go towards its natural state.\n\nunfortunately excercises, eye patches, etc. are only temporary fixes, the body will always go back to its natural state.\n\nSee an opthamalogist anyway, there might be something they can suggest
381087
I read about this.  It happens in bright light because the optical and nasal nerves are so close together.  The brain is receiving all these signals from both that are so close together that it can sort of trick itself.
427620
angle your mirrors so you can see things moving in your mirrors with your peripheral vision.  when you sense movement check it, when changing lanes or slowing down check it.  If you're driving long distances you don't want to stare at the road so keeping moving your eyes around.
447442
yes because your eyes have to strain themselves to see
646005
same reason we close our eyes when we kiss. to get lost in the moment.
843237
The only reason it might be dangerous is that the direction of the reflected beam is hard to control if you're just holding the splitter. The same would be true of a mirror. A small laser pen is uncomfortable if you flash someone in the eye, but the blink reflex is generally fast enough to prevent injury.
666427
Women blink nearly twice as much as men.\nFALSE. Blink rates are affected by emotional state, age, eye health and tasks, but the blink rate for men and women is about the same.\nSOURCE: Cornell University
654051
Neither one actually blinks.  Satellites are visible at night because they reflect sunlight hitting them just like the moon does.  Stars emit their own light, but are hundreds of millions to billions miles away, and so the light from those giant suns looks like tiny pinpricks in our sky.\n\nThe blinking and twinkling of the lights of these bodies is due to shifts in the atmosphere.  Different temperatures of air and smog/pollution from cities create variations in the atmosphere that cause the light to bend, shift and warble on its way to us.  This tends to be more noticeable when observing stars because the relative size of the light source is so much smaller when you compare the percentage of the sky they take up.  A small patch of warm air passing between you and Betelgeuse can make it seem to blur and twinkle.\n\nSo either one can 'blink', but it's a quality of the atmosphere in between you and what you are viewing, and not a feature of the light coming from the object.
764660
Blink a lot until it comes out, or flush with water.