Do Glasses Correct Vision

Do Glasses Correct Vision

Bifocals, trifocals and progressive lenses
 
Many people use monofocal lenses, which means having only one focal power, to correct for nearsightedness, farsightedness or astigmatism. Other people need multifocal lenses, which combine two or more focal powers in one lens. Chances are that by the time you're in your 40s, you'll need one of the multifocal styles, either bifocal, trifocal or progressive lenses.

It may take practice to adjust to multifocal lenses. But the first step is to make sure the frames are properly adjusted to fit your head. Tilt your head up and down. Your line of vision should move smoothly from one focal power to the other in both eyes at precisely the same time. Some eye doctors may suggest that you start with progressive lenses, which saves you having to make abrupt adjustments to the different focal powers.

Glasses That Improve Vision - Lens Treatment

Glasses That Improve Vision

Photochromic. Photochromic lenses are chemically treated so that they automatically adjust to brightness. They get sunglass-dark in direct sunlight and clear in a dimly lit room. They can screen out up to 85 percent of light at their darkest and 10 percent to 15 percent at their lightest.

Glasses That Improve Vision

Some cautions about photochromic lenses: These lenses require UV light to change color, so they won't get dark while you're driving unless the sun is shining on your face through an open window. You may need to keep a pair of sunglasses in the car. Plastic don't change color as quickly or get as dark as treated glass lenses. And neither type of lens changes color as quickly or gets as dark in high temperatures.

Can Glasses Correct Vision

Can Glasses Correct Vision

About 6 out of 10 Americans wear some kind of corrective lenses. And the runaway favorite is eyeglasses. About 8 out of 10 Americans with a prescription for vision correction choose eyeglasses.
 

Can Glasses Correct Vision

The variety of eyeglasses to choose from can seem staggering. Thousands of frame styles and hundreds of lens designs are on the market. And you can buy them from your eye doctor, small optical shops, department stores, discount centers, nationwide optical chains or on the Internet. Eyeglass lenses are made of glass or plastic. Nearly 9 out of 10 eyeglass wearers choose plastic. Once you select the material, you'll be asked to make other eyeglass choices, many of them related to your lifestyle. Your eye doctor can make recommendations if you take a few minutes to discuss the kinds of things you need to be able to do with your glasses. Here are some common lens choices you may need to consider.