When getting into your car on a chilly morning, you may need to wipe or brush off fogged-over windows. Then you might turn on the defogger to keep the windshields clear.
Fog happens when the temperature of your glasses is lower than that of the moist air around it. For example, steam rising from hot water will fog the outside of your glasses. However, the most common reason for this problem is warm and moist air in the space between the lenses and your face.
Fogged Eye Wear Can Be Hazardous
If your glasses get fogged up while cooking, it’s an inconvenience that’s fixed by stepping back from the stove for a bit. On the other hand, fogged eyewear is dangerous while bicycling or jogging because it interferes with your view of road traffic. Both activities generate warm moist air between your face and the lenses. The same problem occurs with other potentially hazardous activities such as skiing.
Fogged up safety glasses are hazardous in many working situations. The visual impairment may cause a construction worker to fall or a heavy equipment operator to damage property or injure someone. Taking safety glasses off to clean them exposes the worker’s eyes to surrounding hazards.
Moisture condenses more readily on dirty or scratched lenses. Therefore, keeping them clean and scratch free retards this effect. However, this alone isn’t sufficient, and you should use available technology that resists fogging such as an anti-fog coating. This is a permanent coating applied to both the inside and outside surfaces of the lenses, which makes them highly resistant to fogging. If this problem affects your glasses, consider getting the anti-fog prescription lens option.
For more information and answers to any questions, feel free to contact us.