Single vision lenses have the same power throughout the lens. These are some of the most common lenses, as they treat either near or far-sightedness, but not both. There are three main ways to put the prescription into a single vision lens – Spherical, Aspherical, and Digital.
Aspheric lenses, on the other hand, aim to flatten lens curvatures slightly, which can reduce the peripheral distortions common in high-index spherical lenses. While this is an obvious benefit for higher prescriptions, it also may help those who are particularly sensitive to visual distortion.
Digital and digital freeform single vision lenses are made using the latest computer and lens grinding technologies to reduce peripheral distortion. This also helps open the field of vision significantly and can make for a more comfortable viewing experience for any prescription strength.
Intermediate single vision lenses are a newer technology, created out of necessity for those who find themselves fatigued by near work, such as on computers or smartphones. As more and more of our daily activities revolve around these types of devices, lenses that can provide adequate and comfortable vision correction become increasingly desirable.
Multifocal lenses allow for more than one prescription in a single lens. Frequently this is found in lenses with zones for distance vision and reading or near vision.
Lined bifocal or trifocal lenses have been the most common kind of multifocal lenses since Benjamin Franklin invented them over 200 years ago.
Progressive lenses allow for a lens to have more than one prescription, but without the traditional lines and sudden change in lens strength found in lined bifocals and trifocals. For some, the sudden shift from near to distance zones can be jarring and uncomfortable. With progressives, the transition is gradual.
In addition to providing a more comfortable viewing experience while correcting presbyopia, some patients may choose progressives because they look practically indistinguishable from single vision lenses to the naked eye. If you have concerns about the syle of bifocals or trifocals, progressives may be the best choice for you!
Although progressive lenses can take some time to adjust to, the brain eventually learns where on the lens to focus in order to see clearly for the situation. Initially, you may experience distortion known as “swim” as you adapt to this new kind of lens. If, however, you find adapting to progressives too challenging, we can always switch your prescription to bifocals, trifocals, or even monovision contacts where you’ll wear a near vision contact in one eye and a distance vision contact in the other. No matter the case, your eye doctor will help you find the perfect solution so you can see clearly and comfortably.
Computers are an almost ubiquitous part of everyone’s daily lives now. Whether you’re using a desktop at work, laptop on the go, tablet, or smartphone, these devices take a toll on our vision.
Computer progressive lenses, however, are designed so you can focus on the intermediate zone comfortably. The most substantial portion of the lens is dedicated to this area about arm’s length away. Additionally, these lenses can be further customized depending on your primary use, so those who predominantly use a smartphone can have a different lens than someone who might generally use a desktop further away from their eyes. There are even designs for those who attend a lot of office meetings where they also need to be able to see a screen across the conference room while taking notes. At Family Eye Care, we are confident we can find you the best option to meet your individual needs!