I bought one of your OptiVisor - head-mounted magnifier products a while ago. It has been VERY useful and one of the first things I grab when sitting down at my bench. The one problem I've had with it is the little plastic rivets that are supposed to hold in the lens popped out. I keep a large and varied supply of zipties nearby and some small ones worked quite well.
I've seen some lighted visors advertised elsewhere, but find a desk lap gives good enough task lighting.