Dark glasses are glasses which have dark-colored lenses to protect your eyes in the sunshine. Sunglasses may be colored, polarized and darkened, so that dark glasses are just one type of sunglasses. The lenses of dark glasses are capable of blocking fierce sunshine. This is the original motivation of its invention.
However, after a long period of development, womens eyeglasses are more commonly used for other intentions. They have long been associated with celebrities and film stars who have the desire to hide or mask their identity in the public. Many celebrities even wear dark glasses while receiving any interview so that their eyes and expressions won’t become too obvious. Dark glasses help hide their eyes which could reveal their emotions. Some people also use dark glasses to cover their dark circles.
Dark glasses also showed in an old fairy. The fairy said that a man worn his dark glasses for so many years that he had forgotten that he had them on. As time passed by, he became increasingly depressed because everything around was darker than he remembered from his childhood. Then he went to meet a scientist and even a psychiatrist. They never realized that the problem was caused by the man’s dark glasses. Finally, when the man played game with his grandchild, the girl grabbed his dark glasses off and finally he found the truth.
In fact, some experts advise not to wear memory metal eyeglasses. They explain that eyes are organs that are designed for light. Sun light is natural and beneficial for human civilization. Dark glasses starve your eyes for light and energy that is transferred through the sun.
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Let’s start by explaining what we mean by “prescription” as there are two meanings in this context and there is often confusion.
Just as glasses can be prescription or non-prescription, so too can contact lenses. Prescription lenses or glasses are intended to correct a vision disorder whereas non-prescription contact lenses or glasses are effectively clear. That is, they do not alter your vision. Colored contact lenses are a typical example of non-prescription contact lenses although it is now possible to get non prescriptioon contacts in a range of colors.
The other thing we mean by the word “prescription” is the piece of paper you get after a sight test which explains the type of contact lens you need to correct your vision. It will detail the curvature of the lens and the strength of the lens.
People who want to buy contact lenses without prescription usually mean that they haven’t had a recent eye test but they want to buy lenses based on their last known prescription. This is also true of people wanting to buy non prescription colored lenses without a prescription.
If you think that your eyesight hasn’t changed you probably think it quite reasonable to buy lenses without an up to date prescription. The same applies if you want to buy colored lenses. The fact is, however, in many countries it is simply impossible to buy contactlenses without prescription, whether they are prescription lenses or not and whether they are colored or not.
You may think that this is unfair, after all, it’s your eyes which might be at risk. But remember this. You only have one pair of eyes and you want to be certain not only of the quality of the lenses you are putting into your eyes but that they are suitable for your eyes. Not every make of lens suits every person, and not every lens will fit your eye. A regular eyesight test will also pick up on any other problems which might have developed in your eyes since your last test.
It makes a lot of sense to get a current prescription, even if you do happen to live somewhere where you can buy contact lenses without prescription.
For more information on getting contact lenses with no prescription, please see www.contactlenseswithoutaprescription.com.
Article Source:http://www.articlesbase.com/vision-articles/contact-lenses-without-prescription-1321464.html