Dark glasses: A Vision glasses for all the problems
Dark glasses are simple, affordable enough to improve their eyesight. Although not considered as a correct vision problems, FDA in the United States, already in ancient Greece to remedy the short-sightedness and astigmatism.
The dark glasses work, focusing on the light in the cornea. Lenses are made of opaque material, or metal, but a small hole, the light passes through them. As a result, in the eyes like a person squints, but with lower concentrations of peripheral light rays in the face, eyes. As a result, the image is placed in the cornea without any outside interference, and as a result of clear vision. This type of glass should be sufficient to eliminate all forms of visual impairment - short-sightedness of the vision of astigmatism.
A lot of theories that explain why the United States will not be approved sunglasses as a legitimate means of vision correction. Some say that this is a conspiracy against the dark glasses. In 1992, the ban was against the New York company, "points aerobics", which aims to strengthen the eyes. When pressure on the FDA to refractionist and opthalmologists, aerobics glasses, and the FDA can not justify its use as a legitimate means to correct the vision of one man.
Sunglasses come in a variety of styles and materials. Some resemble fashion sunglasses that can be used at any time of day on the street. Others, it appears that with the holes specks of "lenses" and are intended for use only for a few minutes a day to improve the visibility of people over time. What costs can be from a few dollars to a few hundred dollars, depending on the material and the quality of the glass. Most of them are foreign retailers in the United States, but there are some dealers who in the United States for the products you want.