What Is Confrontation Visual Field Testing?
The confrontation visual field test is a quick, bedside screening method used to detect gross visual field defects. It requires no special equipment beyond your hands and a cooperative patient, making it available in any clinical setting. While it lacks the sensitivity and precision of automated perimetry, it effectively identifies large scotomas, hemianopias, and significant constrictions that require further investigation.
How to Perform the Test
- Position yourself at arm's length (approximately 1 meter) directly across from the patient, at the same eye level
- Occlude one eye: Have the patient cover their left eye with their palm while you close your right eye (testing corresponding fields)
- Instruct fixation: Ask the patient to look directly at your nose or open eye and maintain fixation throughout the test
- Present targets: Hold up one or two fingers in each of the four quadrants (upper right, upper left, lower right, lower left). Start from the periphery and bring targets inward, or present them statically.
- Ask for response: The patient reports when they see your fingers and how many they see
- Compare fields: Since you and the patient are looking at each other with corresponding eyes, you are using your own visual field as the normal comparison
- Repeat for the other eye
Testing Variations
- Finger counting: Present 1 or 2 fingers and ask the patient to count them in each quadrant
- Finger wiggle: Wiggle fingers in the periphery and ask the patient to point to which side the movement occurs
- Simultaneous presentation: Present targets in opposite quadrants simultaneously to detect extinction (a subtle neurological finding where the patient only sees one of two simultaneously presented targets)
When testing, keep your hand equidistant between yourself and the patient. Present targets starting from outside the expected field boundary and moving inward. This kinetic approach is more sensitive than static presentation for detecting field boundaries.
What the Test Can Detect
Confrontation testing is most reliable for detecting:
- Hemianopias: Loss of an entire half of the visual field (temporal, nasal, superior, or inferior)
- Quadrantanopias: Loss of one quadrant of the visual field
- Dense central or paracentral scotomas: Large blind spots near fixation
- Generalized constriction: Tunnel vision from advanced glaucoma or retinitis pigmentosa
It is not reliable for detecting:
- Small or shallow scotomas
- Subtle or early glaucomatous field loss
- Precise field boundaries
When to Use Confrontation Fields
- As a preliminary screen before formal automated perimetry
- For patients who cannot perform automated testing due to physical or cognitive limitations
- In emergency or urgent settings where automated equipment is not available
- As a quick check during a comprehensive exam to determine if formal testing is indicated
- For neurological assessment as part of a cranial nerve examination
Relying on confrontation fields alone to rule out visual field loss. This test only detects large, dense defects. A patient can have significant glaucomatous field loss that confrontation testing misses entirely. When pathology is suspected, always follow up with automated perimetry.
Documentation
Record confrontation field results for each eye, noting whether the field is "full to finger counting" or describing the area of deficit:
- "CF full to confrontation OU" (normal bilateral fields)
- "CF deficit in the right temporal quadrants OS" (suggesting a left nasal defect)
- Include whether the test was performed with finger counting, finger wiggle, or simultaneous presentation
Key Takeaways
- Confrontation visual field testing is a quick screening method that detects large, dense visual field defects
- The examiner uses their own visual field as the normal comparison standard
- The test reliably identifies hemianopias and quadrantanopias but misses subtle or early field loss
- It is not a substitute for automated perimetry when precise field mapping is needed
- Simultaneous presentation can reveal extinction, a neurological finding where one of two targets is suppressed