Is it true that being in total darkness for 14 hours will cause blindness?
153280
'Darkness' or the 'absence of light' is a relative term - and it is almost impossible to have 100% total darkness in our Planet Earth's surface !\n...But, if such a 'total' darkness is artificially created, and if a person volunteers to remain awake for 14 hours within it - only then can this hypothesis be verified, or rejected !\nWanna try, pardner ?!\n:-))
978590
Maybe get it checked out by an optician.  If your pupils are dilated in strong sunlight you could be getting damage to the inside oif the eye...;
541344
No u could be in a dark room during the daytime and it could effect u
548424
Do this experiment in your own home...wear a blindfold for 24 hours...that's all you need to understand how a blind person "sees" and navigates the world. An ex-girlfriend that was blind had me do this.
195755
IF, it something that continues for more than a few days, then, Yes there may be a problem. Most cases, the cause is relatively minor and can easily be treated. You need to go to an eye doctor or your primary doctor and tell them exactly what happening. What I do anytime I have problems, is write things down as they happen or when I remember, so, I not forget to tell the Doctor something that may be important. Good luck!
837803
I believe its because the photoreceptors and optic nerve are still being stimulated, similar to how your eyes get from a camera flash. The question is, how long does it last and can you still see these flashes at night or in a dark room?
271273
Not especially. In order to see in the dark, you'd need some new types of photoreceptors in your eyes. Short of bionic eyes, nanotechnology, or genetic engineering, good luck with that.
379264
No, it is not true.  The other name for HDP is "photophobia" and it's fairly common - I have it too.  I find it necessary to wear shades even on hazy sunlit days and especially when driving.  Intensely-bright oncoming car headlights at night can be a problem for some folks, too.\n\nIt is a fairly common misconception that reading in poor light situations damages the eyes.  It does not, but it does place extra work on the eyes, which can lead to "tired eyes" and even severe headache after awhile.  Both are self-limiting conditions; put down the book and find a better-lighted place to read or study.  And sometimes, even with good light and all, you just have to put the reading material aside and rest your eyes for a few hours.
634759
No that will not cause astigmatism. lol    It is common for blood vessels to break with intense straining as in vomiting, constipation, etc.  No teatment makes it look or get better except time. It takes 2-3 weeks for the redness to resolve completely.
241272
Sorry to have to be the first to tell you NOT to get as dark as you can.  After seeing my grandfather after a 17 hour surgery to remove skin cancer from his ear and face (they actually removed and than reattached his ear) and then having my 16 year old son diagnosed and treated for Melanoma (the most deadly form of skin cancer), I can't say enough times to protect your skin.  Our dermatologist said tans are just a sign of how damaged your skin is.  Save your money and possibly your life - don't use a tanning bed.
439
yes - close your eyes.  see - its night time!
1132821
yes. the dizziness causes blackouts . not spondilytis itself
1154747
You definitely need glasses to see well but it is nowhere near the worst.  My dad was -11 and Tiger Woods was -14.  Those are both legally blind.
21006
it can put extra strain on your eyes trying to look at a screen. but if you have pleny of lights on and can clearly see whats on the screen it should be alright. another thing that could end up hurting your eyes is keeping them open too long while staring. eyes will get overly dry and over time that can lead to more serious eye sight problems. keep good care of your eyes.. there the only ones you got!
137090
Well, I dont think it can make you go blind, BUT it does put strain on your eyes. It is recommended that if you are going to be on the computer for a long amount of time, to take a break every 15 minutes just to look away from the screen and allow your eyes to focus on something in the distance.
1185494
Yes!  Dark is untill you are able to see and distinguish things in the room.  You could be half blind and see the room dark at normal lights but if more lights are brought in, you see the room perfect.
667642
go into a dark room...eyes naturally dilate in the dark to get in more light