A Goldman eye test, more accurately known as Goldmann perimetry, is a type of visual field test used to map out the boundaries of a person's peripheral vision. It is a form of kinetic perimetry, where a stimulus, typically a light target, is moved from the outside of the visual field toward the center.
How Goldmann Perimetry Works:
Here’s a breakdown of how this test is conducted:
- Moving Stimulus: A small light target of a specific size and brightness is moved from outside of the patient's field of vision towards the center.
- Patient Response: The patient indicates when they first see the moving target.
- Mapping the Visual Field: The location at which the stimulus is first seen marks the perimeter of the visual field for that particular size and brightness of the stimulus.
- Kinetic Nature: This movement of the stimulus classifies it as 'kinetic perimetry'.
- Varied Testing: Different sizes and intensities of light stimuli are used to assess different regions and sensitivities within the visual field.
Key Aspects of the Goldmann Test:
| Feature | Description |
|---|---|
| Type | Kinetic perimetry |
| Stimulus | Moving light target |
| Purpose | Measures the extent of peripheral vision |
| Patient Role | Indicates when they first see the light target |
| Data Output | Mapped visual field boundaries for various stimuli strengths |
Comparison to Automated Perimetry:
While Goldmann perimetry is a kinetic method, it is worth noting that:
- Automated perimetry was developed in the 1970s and is widely used today.
- Automated perimetry uses a static presentation of lights rather than a moving one.
Why Use Goldmann Perimetry?
While less common than automated methods, Goldmann perimetry might be preferred in specific scenarios:
- If fine detail about peripheral vision is needed.
- For patients who have difficulty with the fixated position in automated testing.
- When testing in very young children or other uncooperative patients.
In summary, a Goldmann eye test, or Goldmann perimetry, is a kinetic visual field test that uses a moving stimulus to map the boundaries of an individual's peripheral vision.
