What Causes Glasses Lenses to Become Yellow?

Glasses are an important accessory for many people, be it for reading, driving, or protecting their eyes from the sun. However, over time, glasses lenses can become yellow, which can negatively affect their clarity and overall effectiveness. So, what causes this discoloration and how can you prevent it? In this article, we will explore the reasons why glasses lenses become yellow and provide tips on how to keep them clear.

1. UV Light

One of the primary culprits of yellowing glasses lenses is prolonged exposure to ultraviolet (UV) light. The sun emits UV radiation, which can cause the lenses to break down and become discolored. This process is known as photodegradation, and it occurs when the UV light breaks down the molecular structure of the lens material.

2. Age

Another reason why glasses lenses become yellow is age. As lenses get older, they can become discolored and lose their clarity. This is particularly true for plastic lenses, which can become brittle and prone to cracking.

3. Exposure to Heat

Exposure to heat can also cause glasses lenses to become yellow. If you leave your glasses in a hot car or near a heat source, the heat can cause the lenses to warp and discolor.

4. Chemicals

Certain chemicals, such as chlorine, can also cause glasses lenses to become yellow. If you wear glasses while swimming in a chlorinated pool or accidentally expose them to cleaning agents, the chemicals can cause the lenses to discolor.

5. Smoking

Smoking is another factor that can contribute to yellowing glasses lenses. The smoke from cigarettes contains harmful chemicals that can damage the lens material and cause it to become discolored.

 

How to Prevent Glasses Lenses from Becoming Yellow

Now that you know the factors that contribute to yellowing glasses lenses, here are some tips to help you prevent it from happening.

1. Use UV-Protective Coatings

One effective way to protect your glasses from yellowing is to use lenses with UV-protective coatings. These coatings help to block the harmful UV rays that can cause photodegradation and discoloration.

2. Keep Your Glasses Clean

Regularly cleaning your glasses can help prevent discoloration. Use a soft cloth and mild soap to clean your glasses, and avoid using harsh chemicals or abrasive cleaners that can damage the lens material.

3. Store Your Glasses Properly

When you are not wearing your glasses, store them in a cool, dry place. Avoid leaving them in a hot car or near heat sources, as exposure to heat can cause the lenses to become discolored.

4. Avoid Smoking

If you are a smoker, quitting smoking can help prevent yellowing glasses lenses. Smoking not only damages your health but also harms your glasses lenses.

5. Wear Sunglasses

Wearing sunglasses can also help protect your glasses lenses from yellowing. Sunglasses with UV protection can block the harmful UV rays that can cause photodegradation and discoloration.

Conclusion

Glasses are an important accessory that helps us see the world clearly, but over time, glasses lenses can become yellow and lose their clarity. Understanding the factors that contribute to yellowing glasses lenses can help you prevent it from happening. By taking care of your glasses, using UV-protective coatings, avoiding exposure to heat and chemicals, and wearing sunglasses, you can keep your glasses clear and effective for years to come.