This eye exam will show whether you have a loss of vision anywhere in your visual field. The pattern of vision loss will help us diagnose the cause.

How the test is performed

You sit in front of a concave dome and stare at an object in the middle. You press a button when you see small flashes of light in your peripheral vision. Your responses help determine if you have a defect in your visual field.

Normal Results

The peripheral vision is normal.

What Abnormal Results Mean

Abnormal results may be due to diseases or central nervous system disorders, such as tumours that damage or press on (compress) the parts of the brain that deal with vision.

Other diseases that may affect the visual field of the eye include:

  • Diabetes
  • Glaucoma
  • High blood pressure
  • Macular degeneration
  • Multiple sclerosis
  • Optic glioma
  • Over-active thyroid (hyperthyroidism)
  • Pituitary gland disorders
  • Retinal detachment
  • Stroke
  • Temporal arteritis