Visors may protect the wearer but they do nothing to protect other people and you could still be spreading the virus around. No medical professional would ever wear a visor without a mask.
They also need to worn correctly, ie vertically, not at an angle, and need to be sanitised immediately after taken off as virus can survive for some time on plastic.
My fat balls bring all the birds to the yard
I'm not a pheasant plucker....



