Overview: Fog limits the effectiveness of Personal Protective Equipment (PPE) for eye and face protection. According to the American National Standards Institute (ANSI), it is one of the three most significant barriers to their use, ahead of lack of comfort and fit and scratching. If lenses are fogged, people won’t wear them. If workers can’t see, they could have accidents.
Fog forms on a surface when water vapor in air condenses in fine droplets. A good anti-fog (AF) coating should prevent the formation of such droplets, but not all AF coatings are the same. Typical AF products perform well right out of the package. But after use and cleaning, the coatings will lose effectiveness and come off over time.
State-of-the-art premium permanent AF coatings are more durable, washable, and better performing but aren’t always used or necessary in all environments.
The importance of covering a cough or a sneeze to prevent spreading germs to those around us, often using the crook of an elbow, is something that most of us learned before starting school. Healthcare providers typically wear personal protective equipment, such as the filtering facepiece respirator, to protect both themselves and their patients. However, whether or not this equipment can be reused and still provide the necessary protection is a complicated issue.
During an epidemic, personal protective equipment for healthcare providers can mean the difference between containing the disease and spreading it further. Chief among this kind of equipment is the NIOSH-approved N95 filtering facepiece respirator, which covers the mouth and nose to filter out viruses and other harmful substances. In normal circumstances, filtering facepiece respirators are disposable. In the event of a severe epidemic, however, respirator demand could outpace supply, potentially requiring healthcare