Hmm.. You got a point there. Though why would she do that instead of actually blinding the guy? The thing about her Illusions is that they are only as convincing as the subjects willingness to believe the lie. Something as far fetched as stopping the heart or blinding someone won't be possible. Self-preservation instincts are too strong for that.

Whaf I meant by tricking the five senses is that her Illusions aren't just visual. If she castanets illusion of a wolf for example, the target would head snarls and feel the wolf's bite even though no actual damage is done. 

Alternatively, I can alter the illusion ability to something akin to materialising dreams and nightmares briefly. The subject would be able to fight back, albeit against their worst fear or Achilles heel