subject: With Thorough Knowledge Of Bifocal Sunglasses [print this page] Have you ever heard of bifocal sunglasses? It is believed that many people know sunglasses but they may be not familiar with the bifocal sunglasses. Actually, bifocal sunglasses refer to these sunglasses that prescription sunglasses have the feature of different lenses. That is to say, there are two different optical powers in the lenses. One is prescribed for people who bear presbyopia, the other is for near-sighted people. Moreover, the top half of the lenses is designed for to see things in the distance and the lower half of the lenses is used for people to see things nearby.
When mentioned bifocal sunglasses, they can have the multiple roles. And they can serve as reading glasses and sunglasses. You need to gain your accurate prescription if you plan to buy bifocal sunglasses. Usually, it is suggested to have a comprehensive eye exam each year. Once your prescription has changed, you can change your lenses in time.
Fortunately, bifocal sunglasses are available in various styles. And your choices are wider than before. It is promised that you can pick out styles that you like and fit you best. If you are outdoor activities fans, or you have to spend lots of time outside, you can resort to polarized bifocal sunglasses. These sunglasses can not only protect eyes from harmful UV radiation, but also can block off the glares that other sunglasses cant.
When choosing bifocal sunglasses, there are some useful tips that should pay close attention to, such as lenses, materials and styles etc. Of them, selecting lenses seems to be more important. The lenses should be light weighted and scratch-resistant. Therefore, youd better pick out these sunglasses carefully.
