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Services / Nuero Physiology / VER & VEP


The Visually Evoked Response test (VER), also known as the Visually Evoked Potential test (VEP), is a test for Optic Neuritis or other demyelinating events along the Optic Nerve or further back along the optic pathways. VEPs are very sensitive at measuring slowed responses to visual events and can often detect dysfunction which is undetectable through clinical examination.

A doctor may recommend that you go for a VEP test when you are experiencing changes in your vision that can be due to problems along the pathways of certain nerves. Some of these symptoms may include:

Loss of vision (this can be painful or non-painful);

  • Double vision
  • Blurred vision
  • Flashing lights
  • Alterations in colour vision; or
  • Weakness of the eyes, arms or legs.