When you get new glasses, there are three important things you need to know about lenses:
Your eye care provider will advise you about the type of lens. Most people get either single-vision lenses or multifocal lenses.
Single-vision lenses correct a single vision problem, such as farsightedness, when you see distant objects clearly, but close objects are blurry.
Multifocal lenses correct more than one vision problem (such as reading vision and distant vision). There are different types of multifocal lenses, for example:
Usually the close-up vision part at the bottom of the lens has one of the following shapes at:
Some glasses can have the close-up vision in a different shape and place. For example, electricians who look up to do close work with wires may have the close-up vision at the top of the lens).
Children rarely need multifocal lenses. If they do require multifocal lenses, your eyecare provider will tell you which ones to get.