If you find that your usual set of glasses is not enough, you may need bifocal lenses. Especially for those over the age of 40, presbyopia can be a reality. Presbyopia causes a person to have blurred vision when viewing things within a close distance, such as books, newspapers, and the computer screen. Hobbies such as sewing, knitting, and even simple tasks such as handwriting can be greatly hindered by presbyopia.
Presbyopia is not the only reason why people have issues seeing at various distances. While most children, teens, and young adults have difficulty seeing either from far distances or near distances, some people have difficulty seeing at all distances. People who wear glasses to see things that are far away may suffer from eye strain when doing intricate viewing such as reading.
Some people buy a separate set of glasses for these situations. Often referred to as reading glasses, these glasses can be purchased in a grocery or drug store, or prescribed by an eye doctor. While this is a common solution to this problem, it can be difficult to constantly carry two sets of glasses with you. Even if you can carry both pairs, it can be frustrating having to constantly switch between one set of eyeglasses and the other.
Multifocal lenses allow you to see comfortably at all distances. The main part of a bifocal lens allows you to see things that are at a distance. A smaller part of the lens, located in the lower portion, is stronger and allows you to clearly see things that are nearby.
Trifocal lenses operate similarly to bifocal lenses. Trifocal lenses have three points of focus to allow you to clearly see from distances that are far, intermediate, and close. The upper portion of the lens is for intermediate viewing, the middle is for distance viewing, and the bottom portion is for close-up viewing. Computer viewing is normally considered an intermediate distance, so people that work with computers may have trifocal lenses with a larger area for intermediate viewing.
Multifocal lenses can grant you the ability and confidence you need to carry out your day-to-day tasks. You will no longer have to worry about being able to read street signs, a menu on a wall, or a newspaper in front of you. Multifocal lenses allow you to see at all distances without having to carry two or even three sets of eyeglasses.