Hess-Weiss Test / Tangent Scale

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Examination

  • Simple useful test, indicates type of palsy
  • possible from approx. 6 years of age
  • A normal binocular vision is required
  • Red marks = Right eye
  • Blue marks = Left eye
  • 1 square on Hess-Weiss corresponds to 5 prism diopters, and 5° on the tangent scale

Examples

Sources

  • Orthoptic Department, Eye Clinic, Lucerne Cantonal Hospital