What Is an Aspherical Lens | Pros and Cons
Tue, Nov 23, 21 By : KoalaEye Optical
What Is an Aspherical Lens? An aspheric lens is a lens whose surface profiles are not portions of a sphere or cylinder. In photography, a lens assembly that includes an aspheric element is often called an aspherical lens. The aspheric lens’s more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens. A single aspheric lens can often replace a much more complex multi-lens system. The resulting...

What Is an Aspherical Lens?

An aspheric lens is a lens whose surface profiles are not portions of a sphere or cylinder. In photography, a lens assembly that includes an aspheric element is often called an aspherical lens.

The aspheric lens’s more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens. A single aspheric lens can often replace a much more complex multi-lens system. The resulting device is smaller and lighter and sometimes cheaper than the multi-lens design.  

Aspheric lenses are flatter than traditional lenses, but they still offer the same vision-enhancing benefits. They have a more attractive profile because there is less curvature. In addition, aspherical lenses have a more complex front surface with a gradual curve so that they can perform better by improving the way light refracts onto the retina.

Besides, most aspherical lenses are high-index, which, when combined with the aspheric design, offers a slimmer and lighter option for people who wear glasses so as to improve the look and feel.

The Advantages of Aspheric Lenses

From the above, you have learned some basic information about aspheric lenses. In this section, we will show you some advantages of the aspherical lens. Apart from the style of aspheric lenses, most people choose them because the following reasons:

  • Improved performance
  • Spherical aberration correction
  • Slimmer and thinner profile
  • More frame options
  • Improved image quality
  • Sleeker profile
  • Lightweight and comfortable
  • More natural appearance
  • Improved peripheral vision
  • Multiple lens designs to choose from

So, aspheric lenses come at a lot of advantages. However, everything has two sides. Hence, there are some negative voices of aspherical lens. Therefore, in the following section, we will show you the disadvantages of the aspheric lenses.

The Disadvantages of Aspheric Lenses

Here, we will show some disadvantages of aspheric lenses.

The aspheric lens has a relatively small light area. When the eyeball rotates around, it will blur a little when looking at the outside through lens edge. In other words, the visual range of the line of sight becomes smaller.

Human’s eyeball is spherical and the eyeball rotates to the edge. Through aspheric lenses, the objects near the eye appear protruding.

To sum up, this post from Koalaeye Optical has shown what the aspherical lens is and the advantages and disadvantages of the aspherical lens. If you have any different ideas for aspheric lenses, you can share them in the comment zone. If you have any problems with glasses or sunglasses, please feel free to contact us via the email service@koalaeye.com and we will reply to you as soon as possible.

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