What Is Peripheral Vision?

Peripheral vision is your ability to see objects and movement outside your direct line of sight. While central vision handles fine detail like reading, peripheral vision helps you detect motion, navigate spaces, and stay aware of your surroundings.

How This Test Works: This assessment measures how well you detect visual stimuli at various positions across your visual field. Dots appear at different distances from a central fixation point, and your task is to respond as quickly as possible when you notice them.

Why Test Your Peripheral Vision?

Peripheral vision loss can develop gradually and may go unnoticed until significant damage occurs. Regular screening helps you monitor changes over time and catch potential issues early.

Glaucoma

Progressive optic nerve damage that typically affects peripheral vision first, often without early symptoms.

Retinal Conditions

Retinal detachment, retinitis pigmentosa, and macular degeneration can impact peripheral visual fields.

Neurological Issues

Stroke, brain tumors, or head injuries may cause visual field defects affecting peripheral awareness.

Important Note: This online test is for informational and self-monitoring purposes only. It does not replace a comprehensive eye examination by a qualified eye care professional. If you detect significant changes or blind spots, consult an ophthalmologist immediately.

How to Use

Configure Your Test

Choose your preferred settings before starting to customize the test difficulty and focus:

Test Eye

Select which eye(s) to test:

Both Eyes — General screening
Left Eye — Cover right eye
Right Eye — Cover left eye

Test Mode

Choose thoroughness level:

Quick — 24 points (~1 min)
Standard — 48 points (~2 min)
Thorough — 76 points (~3 min)

Stimulus Duration

How long each dot appears:

200ms — Challenging
400ms — Moderate
800ms — Easier

Best Practice: For the most accurate results, test each eye separately by covering the other eye with your hand (without pressing on it).

Take the Test

After a 3-2-1 countdown, the test begins automatically
Keep your eyes focused on the center crosshair (+) at all times
White dots will appear at random positions around the circle
Press Space, Enter, or click/tap the circle whenever you detect a dot
Use only your peripheral vision — do not move your eyes toward the dots

Pro Tip: Resist the urge to look directly at the dots. The test measures your ability to detect stimuli using peripheral vision while maintaining central fixation.

Review Your Results

After completing all test points, you will receive comprehensive feedback:

Visual Field Map

A circular diagram showing where you detected (green) or missed (red) stimuli. Concentric rings represent different zones from central to outer peripheral vision.

Performance Statistics

Detection rate percentage, average reaction time, total missed count, and your fastest response time.

Zone Breakdown

Detailed performance analysis by region, from central vision through near, mid, far, and outer peripheral areas.

Instant Feedback

Real-time reaction times for detected dots, missed indicators, and warnings for premature responses.

Features

Multiple Test Modes

Choose the level of thoroughness that suits your needs and available time:

Quick Mode — 24 points across 3 zones for fast screening
Standard Mode — 48 points across 4 zones for balanced assessment
Thorough Mode — 76 points across 5 zones for comprehensive coverage

Customizable Settings

Tailor the test to your specific needs:

Select which eye to test (both, left, or right)
Adjust stimulus duration from 200ms to 800ms
Control test difficulty based on your comfort level
Focus on specific eyes for targeted assessment

Visual Field Map

Intuitive visualization of your results:

Circular field map mirroring your actual visual field
Green dots mark successfully detected stimuli
Red dots indicate missed detection points
Concentric rings identify problem zones

Detailed Analytics

Comprehensive performance metrics:

Overall detection rate percentage
Average and fastest reaction times
Total number of missed points
Zone-by-zone performance breakdown

Instant Feedback

Real-time performance indicators during testing:

Reaction time display for each detected stimulus
Missed indicator for undetected dots
Warning alerts for premature responses
Progress tracking throughout the test

Privacy First

Your data stays completely private:

All processing happens in your browser
No data sent to external servers
No personal information collected
Results stored locally only

Frequently Asked Questions

How accurate is this test?

This is a screening tool designed for self-monitoring and general awareness. It provides a useful indication of your peripheral vision capabilities but cannot replace a clinical visual field test performed by an eye care professional using specialized equipment.

Online Screening

This Test

General awareness tool
Self-monitoring capability
Convenient and free
Basic visual field coverage

Clinical Testing

Professional Exam

Medical-grade accuracy
Comprehensive diagnostics
Expert interpretation
Detailed field mapping

Seek Professional Care: If you notice significant blind spots, vision changes, or consistently poor results in specific areas, consult an ophthalmologist immediately for a comprehensive examination.

Which test mode should I choose?

The best mode depends on your goals and available time. Here's a breakdown to help you decide:

Mode	Test Points	Duration	Best For
Quick	24 points (3 zones)	~1 minute	Fast screening, time-limited situations
Standard	48 points (4 zones)	~2 minutes	Balanced assessment, recommended for most users
Thorough	76 points (5 zones)	~3 minutes	Comprehensive coverage, detailed monitoring

Recommendation: Start with Standard mode for a well-rounded assessment. Use Quick mode when short on time, and choose Thorough mode if you want the most comprehensive coverage or are monitoring specific concerns.

Should I test each eye separately?

Yes, testing each eye individually provides more meaningful and actionable results. Many eye conditions affect each eye differently, and testing both eyes together can mask problems in one eye.

Proper Technique for Single-Eye Testing

Cover one eye with your hand (palm cupped, not pressing)
Select the corresponding eye option in test settings
Keep the covered eye relaxed and open underneath
Complete the full test for that eye
Switch eyes and repeat the process

Why It Matters: Individual eye testing helps identify differences between your left and right visual fields, which can be early indicators of conditions like glaucoma, retinal issues, or neurological problems affecting one side of your vision.

What does the stimulus duration setting do?

Stimulus duration controls how long each white dot remains visible on screen. This setting directly affects test difficulty and can help you assess different aspects of your peripheral vision.

200ms

Challenging
Brief flash simulating quick peripheral detection. Best for experienced users or monitoring subtle changes.

400ms

Moderate
Balanced duration providing reasonable challenge while maintaining accuracy. Recommended for regular testing.

800ms

Easier
Longer visibility makes detection easier. Good for initial testing or users with known vision limitations.

Tip: Start with 400ms for your first test to establish a baseline, then adjust based on your comfort level and testing goals.

What is a normal detection rate?

Detection rates vary naturally based on the zone being tested. Understanding these patterns helps you interpret your results accurately.

Expected Detection Rates by Zone

Central & Near Zones 90-100%

Mid Peripheral Zone 85-95%

Far Peripheral Zone 75-90%

Outer Peripheral Zone 65-85%

When to Be Concerned: Consistently low detection rates in specific areas (especially central and near zones), significant differences between eyes, or progressive decline over time may warrant professional evaluation. Don't ignore patterns of missed stimuli in the same region.

Most people with healthy vision detect 85-100% of stimuli in central and near peripheral zones. Detection naturally decreases in outer zones, but consistent blind spots in any area should be evaluated by an eye care professional.
— General Clinical Guideline

Is my data stored anywhere?

No. Your privacy is completely protected. All test processing happens entirely in your browser using client-side JavaScript. No test data, results, or personal information is transmitted to any server.

Privacy Guarantees

All calculations performed locally in your browser
No data sent to external servers or databases
No personal information collected or stored
No cookies or tracking mechanisms used
Results exist only in your current browser session

Complete Control: You have full control over your test results. You can take screenshots, record your scores manually, or simply close the browser to clear all data. Nothing is retained after you leave the page.