Involuntary dilation of the iris.
5 seconds sound clip from the Blade Runner (1982) movie soundboard.
You can hear this line at 00:18:08 in the Blu-ray version of the movie.
Quote context
[...]
- No.
- But in your position, that is a risk.
- Is this to be an empathy test?
- Capillary dilation of the so-called blush response?
- Involuntary dilation of the iris.
- We call it Voight-Kampff for short.
- Mr. Deckard, Dr. Eldon Tyrell.
- Demonstrate it. I wanna see it work.
- I wanna see it work on a person.
[...]