Optic Neuritis

The implicit time of the pattern VEP is increased in patients with optic neuritis. The increased delay persists even after visual acuity has returned to normal. The pattern VEP is useful in confirming a diagnosis of optic neuritis, and may also be useful in confirming a previous attack.

Related Tests

  • VEP
  • Pattern VEP

Related Products

  • UTAS Visual Diagnostic System

Multiple Sclerosis (MS)

The diagnosis of multiple sclerosis depends on evidence for the presence of multiple lesions in the central nervous system. The pattern VEP is one of the definitive tests for confirming suspected MS, with a sensitivity of over 90 percent. VEP implicit time can be extremely prolonged in this disease, and may approach twice the normal value. Abnormal VEP responses in MS patients without visual symptoms indicate that the VEP can reveal subclinical involvement of the visual pathways.

Related Tests

  • VEP
  • Pattern VEP

Related Products

  • UTAS Visual Diagnostic System

Compressive Optic Neuropathy

The latency of the pattern VEP is prolonged by compressive lesions, especially at an early stage. By recording VEP signals from both hemispheres and by presenting stimuli to each eye separately, it is possible to determine whether lesions occur before or after the optic chiasm.

Related Tests

  • VEP
  • Pattern VEP

Related Products

  • UTAS Visual Diagnostic System