1. Why does the goggles fog
1. For secondary protection, it is necessary to use N95 or N99 masks with good airtight performance. However, as the wearing time prolongs and the operation and communication progress, the airtightness of the mask decreases, causing some gas to escape from both sides of the bridge of the nose and enter the goggles from the upper edge of the mask, causing the goggles to fog, reduce visibility, and obstruct vision.
2. When there is a significant temperature difference between the material and the environment, water mist will condense on the surface. This is due to the decrease in air temperature, the saturated vapor pressure of water is reduced to lower than the partial pressure of water vapor in the air, causing the water vapor to condense into water droplets.
As the outbreak occurred during winter, the air conditioning system in the work area and ward was shut down. When medical staff operate under secondary protection, the body temperature of the human body is higher than the indoor temperature, and the temperature difference between the inner and outer layers of the goggles is large, so it is easy to cause fogging of the goggles.
Second, How to deal with fogging of goggles
1. Anti-fog spray for automobile glass
The formula is mild, no peculiar smell, non-corrosive, inside Contains polymer active substances. The mirror surface treated with anti-fogging agent has a layer of hydrophilic transparent film, which makes the fog form a low freezing point mixture after contacting with it to prevent fogging.
Method: Clean the surface of the goggles, dry them with gauze, spray the anti-fog agent evenly on the mirror glass, wipe them evenly with special anti-fog paper towels, and let them dry naturally.
2. Car glass water
The main components are surfactants, anti-scaling agents, deionized water, etc., with low foam and can form on the mirror surface A water-repellent coating to reduce fogging.
Method: Use after diluting with pure water, wipe the glass mirror surface with paper towel to form a layer of coating.
3. Anti-fog spray for swimming goggles
It can be used as anti-fogging agent for various glasses and resin lenses such as goggles, sunglasses, helmets, etc. But it is invalid for lenses with oleophobic layer.
Method: dry the lens after cleaning, dry it again after smearing, then soak it in water for 2 seconds (soaking is because the antifogging agent and the lens increase the affinity of water energy), take it out to dry . After drying, use a special lens cloth to gently wipe off any traces. If not, you don’t need to wipe it. Remember to wipe it repeatedly to prevent the anti-fog layer from being wiped off.
4. Apply hand sanitizer
It is easy to use the antibacterial hand sanitizer that can be seen everywhere around medical staff to prevent fogging of goggles.
Method: Apply the hand sanitizer to the inner surface of the goggles, then rinse with water and spin dry (be careful not to dry with gauze or paper towels), so that the goggles have an anti-fog function.
5. Dishwashing liquid smearing method
Dishwashing liquid is easy to draw, but the foam is too rich, rinse your hands after use.
Method: Apply the dishwashing liquid evenly on the inner surface of the goggles and let it dry naturally.
6. Iodophor internal coating method
The iodophor component is an amorphous combination of elemental iodine and polyvinylpyrrolidone, which has spectral sterilization properties. and surface activity.
Method: Apply the iodophor solution to the inner surface of the goggles, be careful not to apply too thick, a thin layer, so as not to affect the sight and do not stain, it is suitable to dry naturally after application.
7. Soaping method
Soapy water coating can effectively prevent fog, and the effect lasts for a long time.
Method: Rub the soap with your fingers with water, then apply the lenses with your fingers with soapy water, apply both sides, gently wipe the wet water with a paper towel, and a layer of soapy water coating is formed.
8. Antifogging agent for endoscope lens in operating room
This can be found, and it can only be found in hospitals.
9. Alternative method
You can wear a medical disposable protective face shield (cover) instead of goggles for eye and face protection, but pay attention once sexual use.
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