What Are Aspheric Lenses & How Do They Work?
Aspheric lenses are flatter than conventional lenses. Although flatter, they still offer the same vision-enhancing benefits.
They also have a more attractive profile because there is less curvature. This means they don’t have the same “coke bottle” look as you get with traditional lenses.
Aspheric lenses have a more complex front surface with a gradual curve. They also perform better by improving the way light refracts onto the retina.
Eyeglasses wearers who have mild prescriptions may not notice a big difference. However, people with strong prescriptions for farsightedness (who usually wear thicker glasses) will experience a significant change.
Reducing the thickness of the lens offers other benefits. Slimmer lenses give you more options when it comes to choosing frames.
What Vision Problems Can Aspheres Correct?
People with higher-order refractive errors, typically +4.00 diopters or more, are ideal candidates for aspheric lenses. The difference between conventional and aspheric lenses is most noticeable for farsighted people.
Aspheric lenses also work for people who struggle with:
Benefits of Aspheric Eyeglass Lenses
Aspheric lenses aren’t just about style. Many people like that they can choose the frames that best suit their face when upgrading to aspherics.
But style isn’t the only reason people choose this type of lens. Aspheric lenses offer many benefits, including:
- Spherical aberration correction (makes corrected image less blurry)
- Improved performance
- Slimmer and thinner profile
- More frame options, even for people with strong prescriptions
- Improved image quality
- Sleeker profile
- Lightweight and more comfortable
- More natural appearance
- Improved peripheral vision
- Multiple lens designs to choose from
Aspheric Lenses vs. Conventional Spherical Lenses
Here are some of the key differences between aspheric lenses and conventional spherical lenses:
The primary difference between conventional and aspheric lenses is their spherical surfaces.
Aspheric means “non-spherical,” so there is less of a bulge or curve.
Conventional lenses have a spherical curvature on the front of the lens (like a basketball). On the other hand, aspheric lenses are smoother and flatter, reducing distortion when wearing glasses.
Because of their spherical curvature, conventional lenses tend to be thicker than aspheric lenses. This makes them thicker and heavier, especially when you have a strong prescription.
Aspheric lenses are smoother and flatter, reducing the distortion that occurs when someone wears glasses. For many people, this improvement means feeling better in their glasses. They may be more willing to wear their corrective lenses.
In the past, the only options someone would have if they did not like how they looked in conventional lenses were:
- Laser vision procedure
- Avoid wearing their glasses
This is no longer the case with aspheric lenses. You can now choose from various styles and shapes of eyeglasses without sacrificing appearance and comfort.
Conventional lenses are prone to spherical errors (aberrations) that create blurry images. Even slight blurring makes wearing glasses uncomfortable. Aspheric lenses do not have this problem.
With conventional lenses, it’s easy to find affordable frames that match your prescription. Aspherical lenses require more precision to make and take longer to produce. As such, they're more expensive due to manufacturing costs.
Frequently Asked Questions (FAQs)
Are all progressive lenses aspheric?
Yes, progressive lenses are aspherical in design. The curvature of these lenses gradually changes from the top to the bottom.
Why are aspheric lenses expensive?
Aspherical lenses are expensive due to manufacturing costs. They require more precision to make and take longer to produce.
What prescription type do aspheric lenses benefit most?
People with higher order refractive errors, typically +4.00 diopters or more, are ideal candidates for aspheric lenses.
In this article
Best Places to Buy Glasses
Warby Parker has stylish, high-quality frames at affordable prices.
Liingo Eyewear is another great option to buy glasses online.
Best on a Budget
EyeBuyDirect has a wide variety of budget frames starting at $6.
Best Places to Buy Contacts
1-800 Contacts is our #1 recommendation to buy contacts online.
GlassesUSA has a huge selection of contacts, glasses, & sunglasses.