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Nowadays, there are many online eyeglass stores on the internet. People like to buy eyeglass online because they cost cheaper. The prescription glasses for sale at the local store are usually expensive. By purchasing the prescription glasses online, you will be able to save a great deal of money.
Polycarbonate glasses are specifically designed to be resistant against high impact. People who are involved in the sports activities need to wear polycarbonate glasses. The polycarbonate glasses won’t become broken or get scratched.
Aspheric lenses are different than the standard lenses. Most aspheric lenses have a spherical shape. The surface of the aspheric lenses can be made up of different curvature degrees. It has a thinner and flatter appearance compare with other lenses. Aspheric lenses have a larger viewable portion in comparison with the standard lenses.
Polarized prescription glasses can block off the light that bounce back from the water or flat surface. The lens is designed in such as way that the sunlight glare is reduced during performing sports activity. Polarized sunglasses can also be worn during driving.
Photochromic lenses are lenses that can change color when a light shines on it. The materials of the photochromic lenses can be glass or plastic. If you wear photochromic glasses, you don’t have to wear sunglasses anymore. Photochromic lens will not become darker inside the car if the windshield blocks the ultraviolet sun rays.
Bifocal lens is multifocal lenses that are splitted into two sections. The upper part of the prescription glass corrects the farsightedness while the lower parts correct the nearsightednesss. Bifocals lens is commonly worn by senior people that are aged 40 and above. Starting from age 40 years old, your eyesight will start to decline.
Trifocal lens are bifocals lens that have a third section. Trifocal lens helps people to see objects in the intermediate zone, such as the screen of your computer.
The shape of the lens depends largely on the type of vision problem you have. Concave lens is prescribed for people that suffer from nearsightedness. Convex lens is used on people that suffer from farsightedness problem. Astigmatism can be corrected by cylinder shaped lens. The purpose of the eyeglass lens is to focus the sunlight ray on the retina. It is best that you buy prescription glasses that are branded. Branded glasses are from higher quality materials so they cannot easily be damaged. The cost of a branded eyeglass is in between $200 – $700.
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