Why does my glasses fog up when I get into my car?!


Question: Why does my glasses fog up when I get into my car?
Sometimes it happens, sometimes not, but why is does my glasses fog up when I enter my car, then have to wipe them off put them back on, then fog up again.

Answers:

The same reason that your windscreen will steam up in your car. The surface of the lens is cold, and then when the temperature changes around the lens, it will steam up.

For instance, this will probably happen if you drink a cup of tea wearing your glasses; or walk into a chip shop on a cold night wearing your glasses.

I hope this helped.

Tim
Fresh Optical

http://www.freshoptical.co.uk/



temperature change or humidity




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