perimetry

/pəˈrɪmɪtri/
noun
  1. A test used to measure the field of vision, often to check for eye diseases or brain injuries.
    • After the accident, the neurologist ordered perimetry to assess any vision loss.
    • Perimetry helps detect blind spots in a patient's vision.
    • The eye doctor performed perimetry to check for signs of glaucoma.