Something like that, yes. The name for my kind comes from the illusions we create when someone looks into our eyes. When a creature is trapped in an illusion, the link between their mind and soul is weakened.

[A pause.] ...it is rather difficult to explain. Illusionists draw out the soul gradually, akin to pulling a loose thread off an article of clothing. If eye contact is broken, the thread is cut, and only part of the soul is removed. I only feed from the part of the soul that naturally replenishes itself, which is why it causes no harm.