Nope,it hasn’t.
If your glasses are fogging up in sync with your respiration rate or within a very short timeframe your mask is not sealing. Period.
The only difference is when you have either have a valve mask, work with a face shield or similar things or in confined spaces - it’s basically impossible to fog up your glasses with a correctly positioned mask as the filter medium does work as a diffuser. If your mask does fog up suddenly despite a confirmed fit it usually is a warning sign for a breakdown of the filter medium.
(And believe me, we tried really hard - as part of a customer contract we tested all major mask manufacturers available in the EU, with a sample size in the 4 digit range, including UV fluid and thermal imaging tests)
I am fully aware that the equivalent of N95 is often seen as comparable to FFP2, but this is not actually quite correct. The FFP2 has a slightly worse filtration rate and a slightly higher resistance both for inspiration and expiration.
Anyway, I intentionally wrote FFP3 as this is the recommended FFP class for Measles while within the NIOSH legislation only a N95 is recommended.
Nope,it hasn’t. If your glasses are fogging up in sync with your respiration rate or within a very short timeframe your mask is not sealing. Period. The only difference is when you have either have a valve mask, work with a face shield or similar things or in confined spaces - it’s basically impossible to fog up your glasses with a correctly positioned mask as the filter medium does work as a diffuser. If your mask does fog up suddenly despite a confirmed fit it usually is a warning sign for a breakdown of the filter medium.
(And believe me, we tried really hard - as part of a customer contract we tested all major mask manufacturers available in the EU, with a sample size in the 4 digit range, including UV fluid and thermal imaging tests)
I am fully aware that the equivalent of N95 is often seen as comparable to FFP2, but this is not actually quite correct. The FFP2 has a slightly worse filtration rate and a slightly higher resistance both for inspiration and expiration. Anyway, I intentionally wrote FFP3 as this is the recommended FFP class for Measles while within the NIOSH legislation only a N95 is recommended.