Myopia, also known as nearsightedness, is a common refractive error that occurs due to the irregular shape, curvature or thickness of the eyeball, cornea and lens, respectively. Today, this eye condition affects about 40% of the total population. Having myopia, however, isn’t a hopeless case. Fortunately, special types of eyeglasses, contact lenses and other medical procedures can help correct nearsightedness. One of the most popular ways to control the progression of myopia is through the use of bifocal eyeglasses.
An optometrist or eye doctor from the Institute for Control of Eye Myopia in Children discusses how bifocal glasses can help regulate myopia.
What Are Bifocal Eyeglasses?
Bifocal or multifocal eyeglasses contain two or more lens powers to help patients see objects at all distances. This type of eyewear gradually changes in power from the top half to the bottom of the lens. A recent study also shows that reducing the accommodative response of the eyes can help slow down the rate of progression of myopia in children.
Typically, bifocals are prescribed for adults over 40 years old, but they can also be prescribed for children and young adults with eye-teaming or focusing problems. A myopia control specialist, however, may also suggest other ways to treat or manage myopia, including orthokeratology and corneal refractive therapy.
Other Facts About Bifocal Eyeglasses
All bifocals work in the same way, regardless of the reason you need vision correction. A small portion in the lower part of the lens contains the power required to correct your near vision. The rest of the lens, on the other hand, is for your distance vision.
The segment of the lens for near-vision correction may come in several shapes. These include a half-moon, round or ribbon segments. For people who don’t want their bifocals to have visible lines, an eye doctor may suggest progressive lenses.
To learn about how bifocals can help improve vision, contact a local myopia control specialist in your area.