The BBFI is symptoms screener and a self-assessment tool designed to quantify binocular vision related symptoms without attempting to make a diagnosis. As symptoms are selected, a gauge progressively increases, reflecting the overall burden and pattern of complaints. The tool is intentionally non-specific, but higher scores suggest a greater likelihood that an underlying binocular vision issue may be contributing to a person’s symptoms and that further evaluation may be warranted.

Burke Binocular Functional Index (BBFI)

Rate each item 0–10 based on how frequently you experience each symptom compared to people around you.
0 = about the same as most people you know, 10 = much more than most people you know.

Total score: 0 / 150

This self‑screening tool is for informational use only and does not provide a diagnosis.

Headache & Discomfort

Headache, facial pressure, or eye pain after visual tasks

Neck or shoulder tension that worsens during screen or reading work

Spatial Orientation

Dizziness or nausea triggered by near tasks (computer, reading, writing)

Dizziness or motion discomfort while driving or riding in a vehicle

Visual Processing & Crowds

Feeling visually overwhelmed in stores, crowds, or busy environments

Habitually tilting or turning your head to see more comfortably

Difficulty judging distances or reduced depth perception

Balance & Motion

Feeling unsteady, drifting, or needing extra effort to walk straight

Eyes tiring easily or vision blurring after extended near work

Visual Clarity

Double, shadowed, or overlapping vision at any distance

Sensitivity to bright light or glare

Closing or covering one eye to improve comfort or clarity

Reading & Focus

Losing your place, skipping lines, or needing a guide while reading

Difficulty keeping distant or near objects clear and in focus

Words seeming to run together or reduced comprehension while reading

Alignment Test

Follow the steps below carefully:

Position yourself about 60–80 cm from your screen.
Stare directly at the red dot in the box below with both eyes open.
Without moving your head, cover your right eye with your hand while keeping your left eye fixed on the red dot.
Uncover your right eye and then cover your left eye. Continue alternating quickly between eyes several times.
Observe whether the red dot or box seems to shift or jump when switching eyes.

When covering one eye at a time:

Does the dot move in the same direction as your hand?

How far does it appear to move?

Now repeat the above steps while monitoring closely for any subtle vertical shift—it may not be obvious at first.

When shifting your hand from your left eye to your right eye, does the dot move vertically?

Total score: 0 / 150

Save or share your results

Use the button to copy your score and alignment‑test notes. If copy fails, you can select the text manually.

Would you like to book an appointment to discuss these results? If yes, please copy your results from above and paste them into the message below.