One of the best creations ever in the history is man has got to be the humble pair of glasses. It has enabled people to go from being blind as a bat to seeing perfectly with 20/20 vision.
You may sometimes wonder how exactly glasses work and what it does.
When you look at objects around you, the light is actually reflected off the object and into your cornea and lens of your eyes. The image you receive is actually upside down and imprinted onto your retina. This image is then sent to your brain which then interprets the image correctly.
If you have problems with your vision then the most likely reason is that the eye is not reflecting the light correctly. The purpose of glasses is to ensure that the light entering the eye reflects correctly so that the brain can interpret the picture correctly.
It is therefore important that if you want to have good vision to purchase the correct glasses. You can purchase glasses using a Clearly coupon or a clearly contacts coupon to get the price down.