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Lens Surfacing: The Difference Between Digital and Traditional

Digital lens surfacing is mostly relevant to progressive prescription lenses because the major difference between digital and traditional surfacing is digital&#;s ability to do custom regions within a lens to suit an individual. Sound a little complicated? It can be.

It&#;s important to note that, just because a lens is made digitally does not automatically mean it is better than a traditionally surfaced lens. In many cases, there is no difference.

Here&#;s what sets digital and traditional lens surfacing apart:

• In traditional surfacing, a prescription is polished into a lens using a &#;tool&#; that is tailored to a specific prescription. In other words, traditional surfacing labs have pre-made tools stocked for every prescription imaginable.
• For a progressive prescription, a traditional lab must use a semi-finished progressive lens that has the progressive bifocal on one side, then it works the prescription into the side opposite the progressive. This means the size and shape of the bifocal is limited to what&#;s available in pre-made, semi-finished progressive lenses.
• A digital lab has the ability to surface the progressive bifocal and the rest of the prescription on the same side. The progressive can be altered or tailored to suit an individual&#;s requirements, and the lab has the freedom to use a semi-finished single vision lens instead of a pre-made progressive.
• The ability to use semi-finished single vision lenses means digital labs have more options for lens colors and sizes. Semi-finished progressives limit the pupil distance and lens size of a prescription; digital surfacing removes this limitation almost entirely.
• If you are comfortable with standard progressives and your pupil distance works in a specific frame, you will be hard-pressed to find a difference between digitally and traditionally surfaced progressive bifocals.
• If you have single vision or use a lined bifocal, there is no difference for you between digitally and traditionally surfaced lenses.
• In a small number of cases, digital surfacing can create stronger prescriptions than traditional in highly curved wraparound framespupil distance

Our lab uses advanced surfacing and edging technology, but we do not do digital surfacing. The major reason is that the vast majority of prescriptions do not need digital surfacing. For the small few who do, we have an outside lab available to accommodate their needs.

One of the biggest misconceptions about digital surfacing is that digitally surfaced lenses are always better than traditionally surfaced lenses. This is simply not the case. Because digital surfacing is so much more complex, it is possible to over complicate a relatively simple prescription, creating poorer vision for the wearer. We bow to digital surfacing for its ability to make better progressives for those with smaller pupil distances, but beyond that there is no difference between the lenses our lab produces and the lenses produced by a digital lab.

If you have more questions or any comments about digital or traditional lens surfacing, please leave us a comment below! We&#;d love to hear what you have to say. Thanks for reading!

While buying glasses from us, you may notice the option to choose between regular single vision and digital single vision lenses. We explain what digital lenses are and whether you should get them.

Table of Contents

1. What is Single Vision?
2. What is Single Vision Digital?
3. Are Digital Lenses Worth it?
4. Prescription Glasses at SportRx

In the video below, Eyeglass Tyler breaks down some of the basics of single vision lenses vs. digital single lenses and whether digital lenses are worth it.

For more digital glassinformation, please contact us. We will provide professional answers.

What is Single Vision?

Single vision is pretty straightforward&#;it's a corrective prescription lens that corrects for either reading or distance vision. There is only one prescription in the lens, unlike progressives or bifocals.

What is Single Vision Digital?

Digital lenses are a newer technology that offer the best optics possible. Available in both eyeglasses and sunglasses, digital lenses provide better clarity and minimize edge-to-edge distortion to give you a wider field of view, as seen in the image below.

Going with digital can make a huge difference. As your prescription gets stronger, there's more distortion in the lens. Digital lenses are also great for astigmatism or cylinder correction for the same reason.

Conventional lens-making assumes that the lens is flat and that the wearer looks through it straight on. If you pick a wrapped frame or one with curved lenses, there's even more distortion&#;what we refer to as the fishbowl effect. This distortion can make a really cool frame impossible to wear. But by getting digital lenses, you're optimizing your vision for whatever you're using your glasses for.

Additionally, a digital lens is a better option for prescription inserts because of something called the vertex distance. This is the distance between your eye and the lens. When you get a prescription from your doctor, it's meant for a regular pair of eyeglasses. But because inserts sit farther from your eyes than eyeglasses, there will be more distortion. A digital lens accommodates the different vertex distance from wearing a prescription insert and gives you the same clarity no matter what.

There's no particular downside to digital lenses. Because of the better optics, you're getting clearer vision regardless of your prescription, though there's even more of a benefit for those with stronger prescriptions.

Are Digital Lenses Worth it?

One question we get a lot is if digital lenses are worth it. They're more expensive than standard lenses, but we think the price upgrade speaks for itself when you consider the better lens quality. Again, digital lenses are more beneficial the higher your prescription, but the optics are clearer across the board.

Whether you personally need them is up to you. If you're not quite sure, feel free to give us a call! Our opticians are happy to work with your individual needs to make sure you get the best pair of glasses you've ever owned.

Prescription Glasses at SportRx

We hope this breakdown of digital lens technology was helpful. Still got questions? Contact Us to chat with an expert. We&#;ll put you in touch with one of our friendly in-house opticians who can address your specific concerns and help you build your prescription glasses or sunglasses.

Ditch risky online shopping with the See Better Guarantee. Try your glasses or sunglasses for 45 days. If you&#;re not satisfied, send them back. Get a full refund, exchange, or credit towards a better pair. And return shipping? Covered. Get your pair of prescription glasses or sunglasses at SportRx today!

Are you interested in learning more about sgp laminated glass yield? Contact us today to secure an expert consultation!