WHAT IS A VISUAL FIELD TEST?
Visual field tests are performed to detect blind spots and other visual field defects.
Many eye and brain disorders can cause peripheral vision loss and other visual field abnormalities. Visual field testing is most frequently used to detect signs of glaucoma damage to the optic nerve. In addition, visual field tests are useful for detection of central or peripheral retinal diseases of the retina, eyelid conditions such as drooping (ptosis), optic nerve damage and disease, and conditions affecting the visual pathways from the optic nerve to the area of the brain (occipital cortex) where this information is processed into vision.
The most common visual field test uses a light spot that is repeatedly presented in different areas of the peripheral vision. This test is often given as part of a routine eye exam.
The office also offer a visual field screening with a Humphrey FDT machine. This machine use varying intensities of a flickering image to analyze the visual field. It is particularly useful in detecting early glaucoma field loss.