Coming in from the cold on a winter’s day should feel great. But if you wear glasses, it’s more likely to cause annoyance as your lenses steam up in the new-found heat. There are ways to avoid the problem and stop glasses from fogging, but to do this it’s important to understand why it happens.
Every time we breathe out, we add water vapour to the atmosphere. It’s in the air all around us. As long as it stays warm enough, water vapour remains a gas, but as soon as it cools down, it turns to liquid. This is known as condensation.
Just like the steam in your shower cubicle, foggy lenses are caused when the water vapour in the warm air hits a cool surface (your glasses) and turns to moisture. It usually happens when you go from a cold environment to a warmer one, but it can also happen if air gets trapped and warms up between your eyes and your glasses.
So what’s the solution to this intensely irritating problem? If you’re looking for a way to avoid the inconvenience of being blinded by fog throughout the winter months, there are a few things you can try:
Use anti-fog products.These coat your glasses with a special solution that is designed to make the build-up of moisture more manageable, allowing you to see even when water collects on the lenses. They can’t prevent condensation, but they can control how the liquid is distributed on the surface of your glasses, so that it collects in a see-through film rather than a series of droplets. There’s a variety of anti-fog sprays and wipes available on the market, or you can opt for specially made anti-fog lenses.
Make your lenses water-repellent. By applying a water-repellent spray, you can make your glasses a hostile place for water to collect. Note that this solution works by repelling water, while the anti-fog treatments mentioned above are hydrophilic, which means they attract it. Don’t be tempted to try both at the same time, or they’ll simply cancel each other out!
Avoid sudden temperature changes. If you’re turning on the heating, or moving from a cold area to a warm one, try to make the transition gradual. This will help you to avoid steamed-up spectacles. Unfortunately, it’s not always a practical solution, especially when you’re in a hurry.
Make space on your face. Water vapour can collect in the space between your eyes and your glasses, so choosing glasses that fit further away from your face can mitigate the problem. You can also avoid wrapping scarves around your face, as these can trap your breath and make the fogging worse.
Fed up with the frustration of foggy lenses? Laser eye surgery will not only solve the problem; it’ll also leave you free to enjoy an active lifestyle without the inconveniences that glasses can bring. If you’d like to put a stop to fogged-up spectacles this winter, just call us on 020 3369 2020 to book a consultation with Allon Barsam today.