As a seasoned glasses wearer, I have to complain about the weather in my country, we can experience spring, summer, and autumn all in one week, then abruptly plunge into winter like a rollercoaster ride before we’re ready. And my glasses? They’re totally unprepared for this!
You might wonder: what preparation do glasses need?The answer is anti-fogging. The biggest feature of winter is the extreme temperature difference between indoor and outdoor environments. On the first morning after the temperature dropped, I noticed a thin layer of fog on the glass windows and eyeglass lenses are certainly not immune to this fogging nightmare in winter.
Why Do Lenses Fog Up?
In cold environments, the air is obviously dry. When lenses come into contact with warm air (which contains more moisture), a condensation effect occurs upon contact with the cold lens surface. Tiny water droplets form on the lens, causing it to fog up.
This phenomenon is generally not dangerous, but you need to exercise caution when opening car doors. In summer, car air conditioners are usually running, making fogging a common issue. In winter, car windows stay closed, creating a temperature gap with the outside. Always be mindful of safety when opening the car door.
What to Do When Lenses Fog Up?
The first step to tackle lens fogging is to prevent it in advance. Here are a few effective anti-fogging tips:
Lens Anti-Fog SprayClean the lenses thoroughly first. Then spray a lens-specific anti-fog spray evenly on the surface and wipe it gently. The anti-fog effect typically lasts 1–2 days.
Anti-Fog Microfiber ClothThis is a specially treated cloth. Wipe the lens surface repeatedly with it to activate the anti-fog function. After use, store the cloth in an airtight bag to prevent the anti-fog properties from wearing off.
Soap or Dish SoapApply a tiny amount of soap or dish soap to a clean cloth, then wipe the lens surface lightly. This also works as a temporary anti-fog solution.
Anti-Fog LensesThere are specially designed anti-fog lenses available. You can directly opt for these when getting a new pair of optical frame. they are convenient and provide a permanent anti-fog effect.
Recommendations for Anti-Fog Lenses
There are two main types of anti-fog lenses:
Type 1: Activated by Anti-Fog ClothThese lenses rely on an anti-fog cloth to activate the anti-fog agents on the lens surface. When the anti-fog effect fades, simply re-wipe the lenses with the cloth to reactivate it.
Type 2: Hydrophilic Anti-Fog Coated Lenses
These lenses are coated with a highly absorbent, dense, hydrophilic anti-fog film. This film forms a protective layer on the lens surface, effectively eliminating fogging issues.
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