photochromic sunglasses

The Pros and Cons of Photochromic Sunglasses - Koalaeye Optical

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What Are Photochromic Sunglasses?

Photochromic sunglasses are eyeglass lenses that are clear indoors and darken automatically when exposed to sunlight. When the sunglasses are absent of light, the lenses return to their clear state.

The photochromic lenses may be made of glass, polycarbonate, or another plastic. They are principally used in glasses that are dark in bright sunlight but clear in low ambient light conditions. This feature of photochromic sunglasses brings great convenience to people who frequently switch activities indoors and outdoors.

Photochromic sunglasses are also called light sensitive sunglasses, light-adaptive lenses, light intelligent, and variable tint lenses.

How Does Photochromic Sunglasses Work?

Photochromic sunglasses bring great convenience for those who need to switch activities frequently indoors and outdoors. So, how does photochromic sunglasses work? The molecules responsible for causing photochromic lenses to darken are activated by the sun’s ultraviolet radiation. Because the UV rays penetrate clouds, photochromic lenses will darken on overcast days as well as sunny days.

However, the photochromic sunglasses would not darken inside a vehicle because the windshield glasses block most UV rays.

The Benefits of Photochromic Sunglasses

In this section, we will show you some benefits of photochromic sunglasses. The photochromic sunglasses are able to adapt to environmental changes including indoor, outdoor, high or low brightness. The photochromic sunglasses also provide comfort since they can reduce eyestrain and glare in the sun. Photochromic polarized sunglasses provide daily protection against harmful UV rays, by absorbing 100% of UAV and UVB rays. They are available for most prescriptions so that you do not need to juggle between your pair of clear glasses and your sunglasses. Besides, the photochromic sunglasses are available in different colors to suit all needs.

The Disadvantages of Photochromic Sunglasses

Even though photochromic sunglasses come with a lot of benefits, there are some disadvantages. The photochromic sunglasses will get darkened when exposed to the ultraviolet ray. The stronger the ultraviolet ray is, the photochromic sunglasses will be darker. It also can be affected by the temperature. The lens color in the high temperature will be not as dark as in the low temperature.  

The photochromic sunglasses aren’t recommended to used inside a vehicle since the windshield glasses block most UV rays and the photochromic sunglasses would not darken. Some photochromic lenses are not polarized, so it is difficult to prevent harsh glare of sunlight.

However, these photochromic sunglasses are recommended for those children who spend much time playing outdoors and they keep their eyes from the sunlight. Photochromic sunglasses are also popular among people who love sports.


So, if you want to get a pair of photochromic sunglasses, you can try Koalaeye Optical, which is an online optical store and provides all kinds of eyeglasses and sunglasses, such as blue light blocking glasses, polarized sunglasses, mirrored sunglasses, progressive sunglasses, and so on. So, you can choose photochromic sunglasses or photochromic sunglasses cycling here.

To sum up, this post has shown what photochromic sunglasses are and shows the advantages and disadvantages of photochromic sunglasses. If you have any problems with photochromic sunglasses or glasses, you can leave a message in the comment zone or contact us via the email and we will reply to you as soon as possible.

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