How to calculate the thickness of your lenses
As an optician, I've seen many patients who have concerns about the thickness of their glasses lenses. It's a common question that comes up quite frequently. People want to know how thick their lenses will be if they choose a particular index. As a healthcare professional, I know that there isn't always a straightforward answer. The thickness of lenses depends on several factors, such as the strength of your prescription, the sign before your corrections, your pupillary distance, and the frame you choose. But before we delve into that, let's clarify what we mean by "lens thickness."
To put it simply, lens thickness refers to the thickness or thinness of your glasses lenses. If you have a high power and you choose standard lenses, your glasses may end up looking quite thick. This is why choosing the right thickness for your corrective lenses can be a daunting task. As an optician, I've seen firsthand how the thickness of a lens can impact the visual acuity, comfort, and aesthetics of your glasses.
Choosing the right glasses
The refractive index is one of the main factors that determine lens thickness. The index ranges from
1.5 to 1.74, with 1.5 being the most common index and 1.74 the highest available index. If you
choose the thinnest index, you can't go any thinner than 1.74. However, thicker lenses can be
problematic. They can feel heavy, cause peripheral vision distortion, and even make it difficult
to find the right frame.
To optimize your lens thickness, there are several factors to consider. Choosing a smaller frame can reduce the thickness of your lenses, as can selecting a full rim frame. Additionally, a wider pupillary distance can make your lenses thinner. Aspherical lenses tend to be thinner, but they may require some time to get used to wearing. Ultimately, finding the right lens thickness for your needs will depend on your individual circumstances and preferences.
Calculation of the lens thickness
If you're still unsure about what thickness to choose, you can use our lens thickness
calculator to get a rough idea of how your lenses will look post-purchase.
With the right considerations and tools, you can achieve optimal visual clarity
and comfort without sacrificing style.
Note: To run your simulation, select the following equivalents from the Lens Material Type drop-down menu:
- Non-thinned glasses Index 1.5: "Hard Resin
- 1x thinned glasses index 1.6: "1.6 MR8"
- 2x thinned glasses index 1.67: "1.67 MR7"
- 3x thinned glasses index 1.74: "1.74 MR174"
->I am now calculating the thickness of my glasses.
In conclusion, lens thickness is an important part when buying eyeglasses online. Do not forget that it is never easy to get an exact preview of what it will be as many different factors play a role.