If the visual field test (FDT) shows 2 out of 3 fixation errors, what should you do?

In the context of visual field testing, particularly when utilizing Frequency Doubling Technology (FDT) perimetry, fixation errors indicate that the patient may not have been properly focused or attentive throughout the test. When a test shows multiple fixation errors, it suggests that the reliability of the results is compromised. Therefore, repeating the test is the appropriate action.

By repeating the test, you can ensure that the results reflect the patient’s true visual capabilities without the interference of improper fixation. This helps in obtaining more reliable and accurate data for the optometrist to assess the patient’s visual field, which is critical for diagnosing conditions like glaucoma or other visual field loss disorders.

Continuing the test regardless of mistakes could lead to misleading findings. Similarly, marking it as a failure without attempting to correct the errors or consulting with the optometrist without further action wouldn't provide the most effective resolution. Repeating the test not only reinforces good testing practices but also demonstrates a commitment to accuracy in patient care.