Water’s cohesive properties cause it to stick together, bead up, and create surface tension.Īn example of water’s cohesion and adhesion in action can be seen in a glass that is filled with water just past the top. At the same time that adhesion is working to help water stick to other surfaces, cohesion is helping water stick to itself.
It’s the reason why you’ll see water droplets clinging to the branches of plants. Adhesion causes water to stick to surfaces like glass. If you’re wondering why the little water droplets attach themselves to the surface of the lens in the first place, it’s because of two specific properties of water: adhesion and cohesion. It's important that your mask fits well, but there are some extra ways to ditch the fog. You could strap it down with adhesive bandages or athletic tapes (but those aren't fun to rip off. You could add a flexible metal strip to seal the mask to your cheeks and nose. The fogging continues until the surface temperature of your glasses matches the surface temperature of the air (or warm breath) that surrounds them. Likewise, when you leave the cool comfort of your home and step out into the blazing heat of summer, your glasses also fog. Thus, when your hot breath escapes your PPE face covering and hits the surface of your glasses’ cooler lenses, they fog. Warm, moist air that hits a cool surface causes fogging. Fog Formation Informationĭo your glasses fog when you wear other PPE like a face mask, when you walk outside from indoors, or vice-versa? The reason is because of the temperature difference and the level of moisture in the air. Let’s nerd out and talk about why your glasses fog in the first place and how this magical lens coating prevents it from happening. All Stoggles safety glasses come standard with this semi-permanent, anti-fog coating. Whether you experience fogging on your sunglasses, eyeglasses, or safety glasses, it becomes an irritating event that can also place your eyes at risk of injury.Īnti-fog solutions are plentiful, but the true Cadillac of anti-fog fixes is an anti-fog coating applied during the eyewear manufacturing process. None of us are strangers to our glasses fogging and creating an impossible haze through which it’s nearly impossible to see.
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