How do you read the results of a visual field test?

Use this order to interpret your Humphrey visual field every time:

1. Confirm it’s the right patient with name and date of birth.
2. Confirm it’s the right/left eye.
3. Look at the reliability indices.
4. Look at the pattern.
5. Look at the GHT, mean deviation, VFI, and pattern standard deviation.
6. Compare to the previous visual fields.

What do visual field test results mean?

What do the results of the visual field test mean? A “normal” visual field test means that the patient can see about as well as anyone else does in the center and around the edges of the visual field. A test that shows visual field loss means that vision in some areas is not as sensitive as normal.

How do you interpret perimetry results?

A value of 0 means the patient could not see the brightest target, and a 50 means the dimmest target was seen. Most values are around 30 dB, and any numbers below this range imply a possible visual field defect.

What is the minimum visual field for driving?

Drivers must have a horizontal field of vision of at least 120 degrees. In addition, the extension should be at least 50 degrees left and right and 20 degrees up and down. No defects should be present within the radius of the central 20 degrees. This requirement applies to drivers who are binocular or monocular.

What is meant by a visual field?

The visual field refers to the total area in which objects can be seen in the side (peripheral) vision as you focus your eyes on a central point. This article describes the test that measures your visual field. How the Test is Performed Confrontation visual field exam.

How is the visual field examined?

Perimetry or campimetry is one way to systematically test the visual field. It is the systematic measurement of differential light sensitivity in the visual field by the detection of the presence of test targets on a defined background.

Why do I need a visual field test?

A visual field test is used to measure the function of your retina to light sensitivity. If you tell your optometrist that you are having headaches or if you have any diagnosed physical conditions such as diabetes, high blood pressure, or heart issues, then this test is especially important.

How do you test visual fields?

A simple, basic visual field test is performed by having the patient look straight ahead and count the fingers shown by the doctor from each side. However, visual fields are typically measured by a computer in an optometrist’s or ophthalmologist’s office.