"They're rather rare. You only find them under special conditions, and
those conditions, we thought, are absent here. But when you find one,
you can be sure there are more. It runs in families. You see, they're
beings with a completely wild talent. They can be any age, any species,
or of any intelligence, but they're nearly always female. Visibility
refraction just doesn't work right for their senses, and they can cause
trouble." He looked closely at Konar.
"You were lucky to get away. A really terrified transvisor could kill
you, just as surely as a heavy caliber blaster."