Internet has caused many optometrists to launch their online stores. The online stores allows the customers to customize the eyeglasses with a variety of options just like at the offline stores. You will be able to customize the lens and styles of the eyeglasses. Some of the lenses which you can choose from include hi index lens, polycarbonate lens, trivex lens, aspheric lens and etc.
High index lens is thin and lighter than the standard plastic lens that is used in making eyeglass. The plastic that is used in making the high index lens is different than the plastic that is used in making the ordinary plastic lens. The high index lens enables your vision to be corrected without using a lot of materials. It is often graded in between the number range of 1.5 – 1.67. If you suffer from high prescription power, you should use the high index lens. The high index lens offers better cosmetic appearance for people that has high index lens. If you suffer from high prescription power and you use the ordinary plastic lens, people will stare at you because the lens is very thick. To eliminate this problem, you should wear the high index lens.
The polycarbonate lens is made from a type of plastic called polycarbonate. Polycarbonate lens is able to withstand the high impacts such as dropping on the ground and etc. It is covered with a layer of the UV protection coating. The UV protection coating prevents the sunlight from shinning through the lens and entering into your eyes. When you are outside, you are subjected to the UV ray so it is important to wear glasses with UV ray protection coating.
Most people will add additional protective coating to the lens. The scratch resistant and UV ray protective coating are the two most common protecting coatings that are added to the lens. The anti reflective coating is also frequently added to the lens. The anti fog coating is another option which you can add to your lens. It is used by people that live in the cold climate. If you live in a cold climate, you will have to deal with the fog. When there is fog, the lens will become temporarily blurry. Lens fogging is dangerous because it prevent you from seeing the objects ahead of you. Several companies manufacture eyeglasses with anti fog coating including Opticote and Franklin Park. The anti fog coating can be applied to a variety of materials such as plastic, polycarbonate and other types of lenses.
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