I am near sighted. When I look in the rear view mirror in my car without my glasses, things far away are blurry. When I put my glasses on, they are clear. The mirror is close to me, so I wonder why I can see objects in the mirror better with my glasses on.
119597
That's because light reflects in the mirror just as if it's coming from the same distance the real object is but behind the mirror.  You are nor looking an image that is at the mirror distance, but really at the real object distance.
589482
B - the reason you can see an object is because light bounces off of it. if light bounced off of an object evenly, then you would have to be in a specific location to see it (think of a mirror reflecting a laser. you can't see the laser beam in the mirror, ideally, if you are shining it at an angle). if the light is reflected unevenly, then you can see it at pretty much any angle.
143968
Your vision doesn't always correspond exactly to the power of your contacts.  And it doesn't really matter because the contacts correct you to 20/20 or better.  The only time it matters is when you can't be corrected to 20/20 with glasses or contacts.  I'm also a -4.25 and I know that without my contacts I can just make out the big E at the top of the eye chart (that's 20/400).
126479
Did you buy glasses? It sounds about like the price and description of two lenses. If your didn't buy glasses, you'd better ask them, maybe they made a mistake.
428795
It is not so important how you feel without your glasses on but how your eyes feel with your glasses on.\nDepending on the reason for your need of glasses to begin with may explain why you are experiencing what you describe.\nYour glasses are probably getting your vision in order and when you take the glasses off you are probably experiencing the actual problem that was the cause for your need for glasses.\nYou never noticed it before you got your glasses,you were use to the way your eyes felt and how you were seeing.\nThe headaches are probably caused by the fact that your vision isn't being corrected when you take your glasses off and your eyes are trying on their own to correct themselves to the proper "alignment" as prompted by the glasses.\nYou can take your glasses back and have them read to see if the prescription is correct but I betcha it is and all of this is your getting use to better vision and getting adjusted to it.
423098
johnpaul_ is revealing his own lack of education in his answer.\n\nYes, it is possible for glasses to give you better than 20/20 vision. The 20/20 number is a comparison between two people... the first number represents you, and how close you have to be to see a given object clearly. The second number represents a person with "normal" sight and how far away they have to be to see that object clearly. For example, if person who has 20/200 vision (legal blindness) has to stand 20 feet away from an object in order to see it clearly, a person with normal vision can stand 200 feet away and see the image as clearly.\n\nSo there is nothing special about 20/20 vision. It is just an aribitrary standard based on the average range of vision (which was established many years ago, an may not be reflective of the current US population). So, good glasses will not necessarily "correct" you to 20/20 vision. They may be "over prescribed" and land you at 25/20, or under-prescribed and land you at 20/25. There is nothing wrong with the eye chart. If you are too over- or under-prescribed, you may experience a lot of eye strain. If that happens you need to get a new pair or you may get a lot of headaches.
162569
i always tell my mom i need my eyes checked. i have always wanted glasses since i was a little kid. but now im over it. and im not  into girls but they are hot in glasses. they look so smart/mysterious and such
439813
The person who does not use glasses has an eye that is curved to focus light almost exactly on the retina.  The person who does use glasses has eyes that focus light either in front of or behind the retina, and the glasses change the focus of the system to coincide with the retina as in a person who does not require vision correction.
204858
kids.\n\nAnyway I do. Well, sorta. My glasses are really cool--for a while there I was wearing contacts because my kids were little and yanked at my glasses. I replaced them with funky red glasses--the contacts that is, not the kids. The kids I replaced with...okay never mind.
187783
Well if you are talkin about a mirror made of floated glass a layman can c the quality of it other wise ind. know how is required i think (i am not proffesional in it, just being in a float glass plant for a week). If it is a mirror and you c a distracted reflection then b sure that there is impurity in the glass, as well as the transparency of float glass is supposed to be very high compares to the conventional one.
61743
When I don't have my glasses on. I can't see where they are to wear them.\n\nSo I always complain: where are you so I can wear you? And so it wears me out me to try to find where they are so I can wear them. I get so tired, that I need to drink glasses, and glasses (of water), before I realize that I have been wearing then all along.\nAnd, as a matter of fact, I've been wearing these, for over 15 years..So, one could say, they are pretty worn out.
3036
It's because of the minor imperfections in the placement of the mirrors. Also, because the effect can't be seen without seeing it at an angle, it causes a curve based on your viewpoint.
36405
It sounds like you may need glasses.  Make an appointment with your eye doctor and he/she will be able to tell you exactly what you need.
674014
I don't think so.  I have terrible eyesight.  I can't even see the big\n"E" on the eye chart!  I am very nearsighted.  I am in my mid 30's and have had the same prescription for several years now.\nI think it's because I do as much reading as possible without my glasses and I don't wear contacts anymore.  My sister, on the other hand, gets a new prescription every year and it's always worse.  I have heard of some kind of eye exercises advertised on the radio that supposedly restore at least some sight.  I'm sorry I can't be more specific.
108456
You're looking at an image reflexed 5 feet away while standing 5 feet away. \nSo the image in the mirror would be a total of 10 feet away from you. Want to see it 5 feet away? Move up some more ;)
28084
is this a question about being a pilot? if not the only thing that matters is that your vison can be correceted to 20-20 or close to it with glasses.\n\nmsg me if you have more questions
468844
I also have a hard time reading the stuff on those blasted machines, but see just fine otherwise, if I'm controlling my diet.\n\nOne thing you may want to get checked, if you do have problems with blurred vision, is your sugar.   With sugar problems (diabetes), your vision can be clear or blurred, depending on your sugar levels.   There are simple tests your doctors can do to check your glucose levels, and it would be wise to do so.  If you have difficulty with blurred vision after eating sweets or a big meal, it may explain why you can't see at times.     Instead of getting glasses, you might need to adjust some food intake.  I wish they had checked mine years ago, instead of slapping glasses on me.\n\nGood luck to you.