Blinded by the fog…

I work as a receptionist for both an optometrist and a physiotherapist, and some perks of the job are me owning multiple pairs of glasses and free physiotherapy.  Given I recently had knee surgery, I actually benefit more from these things than I do my actual pay ( I only work 2 days a week)! Glasses today are very much a fashion thing and I really love the variety that I have. I have multifocals and wear them more than I actually need to; it’s easier to leave them on than constantly take them on and off and no doubt lose them! The only problem I ever have with my glasses is when I reach into the oven to pull something out, but this is due to a scientific thing not optometric care. Remember how you learned in school about water and the three states it takes: solid, liquid and gas? What’s happening to my glasses is really just an evidence of moisture in the air (and on your skin) and how it changes form based on the temperature.
If you’ve been out in the cold, you’ve probably “seen” your breath when you blow out a warm breath of air. What you see as your “breath” is actually a cloud of moisture. When your glasses fog up walking into a heated room, it’s the same idea. Moisture on your glasses heats up, condensing into a layer of fog over your lenses – foggy glasses! When you reach your head into the oven, it’s the same concept. The moisture on your lenses gets heated quickly when you’re exposed to the blast of hot air from the oven. The invisible water vapor molecules turn into a thin layer of water molecules on your lenses. The opposite effect can also happen. If you’re in a toasty warm room, and then walk into a freezer, the moisture in the air will change states and give you foggy glasses immediately!
Sometimes your glasses will fog up just from sweat coming off of your body. Anyone who wears their glasses to the gym or playing tennis already know this. The heat and perspiration generated from your face can become a glasses fog. Make sure you always have a soft dry cloth on hand ( strangely enough I have many) and in minutes your lenses will be crystal clear…

“I tried to grab fog, but I mist!”

Lis 🦉

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