Roving Esterman tests in Australian driving assessment

In standard Esterman testing, the patient is expected to maintain fixation while peripheral stimuli are presented. In roving Esterman, the field is performed without the same fixation requirement, so the patient is allowed to search more naturally.

Austroads lists roving Esterman as an additional factor that may be considered by the driver licensing authority. It describes the test as binocular Esterman conducted without fixation monitoring and requires two consecutive tests with strict false-positive limits.

That makes roving Esterman a special evidentiary pathway. It is not simply an unreliable Esterman with a nicer label.

A licensing authority may ask for roving Esterman when the standard field does not capture the whole functional question, or when a patient with a longstanding defect may compensate by scanning.

The idea is not that scanning makes all defects safe. It is that real driving allows eye and head movement, and longstanding stable defects may be handled differently from new or progressive defects.

The clinician still needs to provide reliable evidence. Roving does not remove the need for careful printout review, false-positive reporting, and clinical context.

Austroads describes two consecutive roving Esterman tests. This is clinically sensible because allowing a search strategy can introduce variability, learning effect, and performance differences between attempts.

If one test is clean and the other is poor, do not simply choose the favourable one. Ask why the results differ. Was the patient fatigued, confused, anxious, over-clicking, or adapting during the test?

DRIVE Fields should show caution when results are at the edge of the stated false-positive allowance or when only one roving test is available.

The Optometry NSW/ACT guide emphasises that roving Esterman results should be provided in numeric field format. That matters because a numeric point map allows the reviewer to see the actual point-by-point pattern.

A shaded summary graphic or pass/fail statement is weaker evidence. It makes it harder to determine horizontal extent, central clusters, and whether a defect is scattered, vertical, hemianopic, or artefactual.

If you are asked to provide a roving Esterman, make sure the printout can be read by another clinician or the authority without needing your memory of the test.

Label the test clearly. Say that it was a roving Esterman, state that two consecutive tests were performed, list false-positive counts for each, and describe the point pattern using the same clinical language you would use for a standard field.

If the roving result supports conditional consideration, say so as a recommendation or support statement, not as a final licensing decision. Include stability, adaptation, driving record, and task context when relevant.

If the result is incomplete, say what is incomplete. For example: one test only, false positives not recorded, numeric map not available, or printout source uncertain.

DRIVE Fields can help structure the roving pathway by asking for the evidence that makes the result interpretable. It can also prevent a roving test from being accidentally treated like a standard reliable Esterman.

The app is deliberately conservative when wording is ambiguous or when the authority may need to review the original printout. That is the right posture for a pathway that already exists because the standard test did not tell the whole story.

For teaching, roving Esterman is a reminder that visual-field assessment for driving is partly measurement and partly clinical judgement about adaptation and real-world driving context.

A roving result should not be used to make a dangerous field look acceptable. If the missed points form a central neurological pattern, if the patient has a recent defect without demonstrated adaptation, or if the two roving tests disagree materially, the result still needs cautious review.

The practical threshold is not just whether the patient can find lights while searching. The question is whether the evidence is strong enough for a licensing authority to consider the person in their real driving task. That includes duration, stability, cognition, neck movement, scanning behaviour, and the clinical cause of the defect.

For an optometrist or ophthalmology registrar, the safest teaching line is: roving Esterman may add functional information, but it does not erase the original pathology or the need for a source-traceable report.