Eyeglasses & Eye Care Info

When your vision began to decreased, how do you choose spectacle between glasses and contact lenses ? Which one better? Such problems can be often heard. But which one is best to be selected?

What is difference between glasses and contact lenses?The main difference is that the distance between eyes and lenses. Typically, glasses lenses are 12mm away from the eye. The contact lens is closely affixed together with the cornea of eyes.

Wide field of vision is the advantages of contact lenses, glasses lenses are 12mm away from the eye and it will narrow field of vision if wear glasses. If you now wear glasses,take the glasses gradually away the face, you can feel the lens area of vision will be gradually narrowed. However, contact lenses will not make narrow field of vision, and we will get the same field of vision as the naked eye. Generally speaking, wearing glasses when the vision is 120 degrees,but if wearing contact lenses we can get about 200 degrees field of vision.

At first glance, we would feel wearing contact lenses are more comfortable than glasses, but it is indispensable for us to touch the contact lenses by our hands every day , therefore, the lens is easy to be contaminated. if wearing contaminated contact lenses, maybe harm our eyes and cause inflammation, But for the glasses, you don’t need worry so much about it on this point. In addition, the contact lenses are not suitable for dry eye syndrome,beacuse the metabolism of the cornea need oxygen supply, and the contact lenses will hinder the supply of oxygen.Also for patients with dry eye due to tear and thin, contact lenses may harm the corneal epithelium. Second , the cornea contains nutrients for metabolic source of supply may also be reduced, for such a person with glasses is the best in vision correction.

Even we use the contact lenses, but in most of time the contact lense have to be replaced with glasses. In general, it is necessary for people who use contact lenses to bring prepared glasses.