Recently, wearing a face mask in public space has been urgently advised. But how do you, as a spectacle wearer, prevent your glasses from fogging up? These are two easy solutions.
When you wear a mask, exhaled air is sent upwards towards the glasses. The warm water vapor then condenses on the cold glasses. The result: due to the surface tension between the water molecules, small droplets form that distribute the light, so that the glasses are less able to transmit contrast.
To clean
While the glasses are the problem, they are also the solution. Just before putting on your mask, wash the glasses with soap and water, and shake the residue off the glasses. Then let your glasses dry, or dry them gently with a soft cloth. Then you wear the glasses as you normally would.
The soapy water leaves a small layer of surfactant that lowers the surface tension, allowing the molecules to spread out evenly as a transparent layer. In everyday life, this method is also often used to prevent fogging of surfaces.
Ventilate
A second solution is to interrupt the nebulization process earlier. The standard way to wear a face mask is to tie the rubber bands parallel to each other above and below the ear. A better way to attach the mask is to cross the rubber bands; the part that normally goes above the ear now goes under the ear, and vice versa.
By doing this, the mask fits closer to the nose, creating two vents on the side of the mask, rather than a single one at the top. As a result, the water vapor escapes on the side and does not rise to the goggles.
Also with a mouth cap on: keep one and a half meters away from each other where possible.
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