Current events have forced more and more people to wear face masks to protect themselves and those around them. There is only one problem: those who wear glasses face another difficulty – their glasses fog when wearing a mask. This is a fact of life when wearing glasses – they fog all the time. Temperature changes, face protection equipment and winter equipment are some of the common causes of fogging of glasses. Here are some tips to help you deal with this situation.
Why do glasses blur?
The glasses fog for one reason, and that is changes in temperature. If you are out on a cold day and enter a warm and humid room, your glasses will fog as a result of water vapor condensing on the cold glass.
Another contributing factor is your breath. The mask you wear directs your breath upwards rather than outwards. Your breath is also quite moist because the inside of your mouth and lungs are wet. The warm, moist air you exhale encounters the relatively cold surface of your glasses and condenses on them. The droplets that form on your glasses stay there because of the so-called surface tension and should be wiped or evaporated.
Option 1: Position and tighten your mask properly
As mentioned, the reason for the fogging of the glasses is the moisture from the breath. Most of the masks we wear are canvas or paper masks. You need to check if there is a metal or plastic adapter attached to the nose above the mask. When you attach the mask correctly to the nose and face, you minimize the breath to go up and prevent the glasses from fogging. You can combine this with breathing adjustment.
There are also more progressive masks, for which it is enough just to attach them nicely to the face. Sometimes the body also generates moisture from the sweat itself, and not just from the breath, which again brings us back to the fact that in some situations we have to control our breathing and look at other options.
Option 2: Use a paper towel or patch
This is primarily an option for paper or canvas masks that do not attach well to the face. Take a paper towel and fold it, put it on top of the mask before putting it on your face and squeeze it down. This gives you two benefits. The first benefit is that, as an absorbent cloth, the paper towel will block and absorb moisture from your breath, which would otherwise go up and fog your glasses. The second benefit is that it provides a softer base than the mask itself and is more comfortable to wear. You can do the same with a patch.
Option 3: Use anti-fogging agent
Nowadays, there are many anti-fog devices for glasses, helmet visors, glasses. They all work the same way: apply them to the glass and wipe them off, leaving an invisible layer that helps reduce surface tension. In any case, their effect is longer during the day.
Option 4: Soap and water
Wash the glasses before applying the mask. Use soap and water to wash them and instead of wiping them with a cloth, shake off the excess droplets and let them air dry.
You need to put a thin, invisible layer of soap on your glasses. This will prevent moisture from accumulating on the glass. Why does it work? The answer lies in the interaction of soap and water. The water, in its pure or mostly pure state, has a high level of so-called surface tension. You may have noticed when water stays on the surface instead of spilling on the surface. This is because it maintains its surface tension in place. Soap when mixed with water disrupts that surface tension. By placing a thin layer of soap on the glass, it makes it harder for moisture to condense on the glass, although it is not completely impossible.
The soap during the day can reduce this effect, so you will need to repeat this procedure more often. Yes, it is an effective solution, but it is not long lasting.
Another similar product that has the same effect is shaving foam. A very thin layer of foam can prevent moisture on your glasses.