Feel around for the switch; most toggle switches are up/on and down/off.
No there ways of becoming blind.
If you're fully blind, you don't see anything of the outside world at all. Some may be legally blind but still be able to differentiate between light and dark.
Not all blind people use cell phones but I bet at least 40% of blind people use cell phones.
Totally blind people do not have any ability to see visual images, light, or darkness. They may experience sensations through their other senses, such as hearing, touch, taste, and smell, to navigate and understand their surroundings.
You can infer what traffic lights other people have based on the behavior of their vehicles. For example, if you see a line of cars slowing down and coming to a stop while approaching an intersection, it is likely that the traffic light for that direction is red. Conversely, if you see cars accelerating as they approach an intersection, it is likely that the traffic light for that direction is green.
If a man is totally blind you can never prove to him that there is a light, and if has any sight at all, there is no need to prove it because he will see it himself. We don't prove the light but the light proves us whether we're blind or not. Jesus Christ was and still is the light of the world, and if you can't see that light, that's the proof that you are blind.
67% of all blind people in the U.S are all currently drug abusers. -New York Times
Light is important because without it we would not be able to see it would be like were all blind 
Window blinds are of course made to keep sunlight out. With that being said there is a specific kind that prevents almost all light from getting inside the blind. That kind of window blind is called a blackout blind.
Yes. All marsupials are born extremely underdeveloped. They are blind, hairless and utterly helpless.
yes color blind people can become cops all they have to be able to do is see(:
I am not a blind person although I do have some blind friends, so I have some insight into the psychology of the blind. Blind people, much like sighted people, are not all the same, and do not all have the same criteria for dating. Some blind people would be quite happy to date someone who is ugly but friendly and who has shared interests (for example, science fiction fans often like to date or marry other science fiction fans). But appearance can still matter. A blind person may wish to have children, and if so, he or she would normally prefer that his or her children will be good looking. So the appearance of a spouse, which will be part of the genetic inheritance of the children, will still matter, even if the blind person never actually sees that appearance. How would a blind person know what is ugly, and what isn't? I don't think they would care too much since they can't tell who is attractive, and who isn't.