The Pulfrich stereo-illusion as an index of optic nerve dysfunction.

@article{Sokol1976ThePS,
  title={The Pulfrich stereo-illusion as an index of optic nerve dysfunction.},
  author={Samuel Sokol},
  journal={Survey of ophthalmology},
  year={1976},
  volume={20 6},
  pages={432-4}
}
A simple test based on the Pulfrich phenomenon may provide an indication of optic nerve dysfunction. When a small object swinging pendulum fashion is viewed binocularly by a person with one eye covered by a neutral density filter, the object appears to swing in an elliptical path. The patient with optic nerve dysfunction may see it this way without use of a filter. The Pulfrich theory is explained, clinical applications are discussed, and instructions for constructing a Pulfrich apparatus are… CONTINUE READING

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