Ultrasonic irradiation and pupillary response.

@article{Greguss1975UltrasonicIA,
  title={Ultrasonic irradiation and pupillary response.},
  author={P Greguss},
  journal={Ultrasonics},
  year={1975},
  volume={13 2},
  pages={63-5}
}
The effect of ultrasonic irradiation on the pupillary response was investigated over an intensity range from 0.1-1.5 W cm-2 measured at the surface of the applicator head at frequencies of 0.8 and 2.4 MHz.