The lenses might only be part of the problem.
I used to be a lifeguard at a pool that did not allow this type of mask. Our employer explained that there was an incident sometime back where a man was using this type of mask and suffered a heart attack. Apparently, the goggles interfered with the rescue attempt. I don't know if the problem was with rescue breathing and CPR etc. I always thought that was strange because couldn't they just remove the goggles easily. But I wasn't there and do not know what exactly occurred. However, the man did not survive and the goggles were then banned.
I could imagine a case where there was a neck injury, in which case you don't want to be messing around with pulling goggles off the person's head. Normal goggles might not be in the way of rescue breathing, but these might. In any case, once there's a case like this, I think the insurance companies start making it a condition of the insurance that they ban certain things, so that could be why it's banned at other pools.
The lenses might only be part of the problem.
I used to be a lifeguard at a pool that did not allow this type of mask. Our employer explained that there was an incident sometime back where a man was using this type of mask and suffered a heart attack. Apparently, the goggles interfered with the rescue attempt. I don't know if the problem was with rescue breathing and CPR etc. I always thought that was strange because couldn't they just remove the goggles easily. But I wasn't there and do not know what exactly occurred. However, the man did not survive and the goggles were then banned.
I could imagine a case where there was a neck injury, in which case you don't want to be messing around with pulling goggles off the person's head. Normal goggles might not be in the way of rescue breathing, but these might. In any case, once there's a case like this, I think the insurance companies start making it a condition of the insurance that they ban certain things, so that could be why it's banned at other pools.