Precision eye care, refined
Vision screening from home. Eight eye screening tests — acuity, colour, astigmatism, contrast, stereoacuity, PD and more — with results you can share with an optometrist. Screening only, not a diagnosis.
Vision screening in four steps
From calibration to results — here's how Spect-IT delivers accurate, repeatable vision screening.
Calibrate your screen
Use a credit card to calibrate screen size (pixels/mm) and set your viewing distance. This ensures optotypes appear at the correct physical size for screening accuracy.
Follow the guided journey
Our guided journey recommends test order and walks you through pre-test setup: distance, lighting, glasses on/off, occlusion. Progress is saved — resume anytime.
Complete screening tests
Eight eye screening tests: Visual acuity (Sloan ETDRS), contrast sensitivity (logCS), color vision (confusion-line plates), astigmatism (radial patterns), visual field (Amsler grid), stereoacuity (random-dot stereograms), pupillary distance (PD), and refractive screening (pinhole test). Plus hearing screening with pure-tone audiometry.
Get your summary & PDF
Receive a screening results summary with logMAR scores, per-eye breakdown, and recommendations. Export as PDF to bring to your optometrist appointment.
Screening Methodology
Visual Acuity
Standard Sloan optotypes (C, D, H, K, N, O, R, S, V, Z) at WHO-compliant visual angles. 6/6 (20/20) = 5 arc minutes per stroke. ETDRS methodology with 5 letters per line. LogMAR scoring for clinical reporting.
Color Vision
Confusion-line pseudoisochromatic plates (NOT Ishihara) for protan and deutan deficiencies. Control plates mark unreliable tests as inconclusive. Procedurally generated dot fields (~2000 dots) ensure copyright-free testing.
Contrast Sensitivity
Pelli-Robson-inspired low-contrast optotypes assess vision in reduced lighting. Screens for cataracts, glaucoma, macular degeneration. LogCS scoring.
Astigmatism
Radial fan, cross-grid, and clock dial tests identify corneal irregularity and orientation. Results inform cylinder/axis estimates.
Visual Field (Amsler Grid)
Central 10° macular screening for metamorphopsia, scotomas, and distortion. Per-eye testing with fixation monitoring. Critical early indicator for macular conditions.
Refractive Screening
Compares uncorrected acuity to pinhole acuity to detect refractive blur — tells you if correction may help, NOT a prescription. Does NOT generate sphere, cylinder, or axis values. Results are NOT dispensable. Consult an optometrist for prescriptions and eyewear.
Stereoacuity
Random-dot stereogram test screens binocular depth perception using red-cyan anaglyph display. Measures stereo threshold in arcseconds. Requires anaglyph glasses.
Pupillary Distance
Manual marker-based PD measurement with calibrated screen. Provides screening estimate of distance between pupil centers. NOT for ordering glasses — professional measurement required.
Screening Note: Spect-IT uses screen-based testing with calibrated physical sizing and research-based protocols. Validation study is in progress with optometrists. All results are screening estimates for informational use — not medical diagnoses, clinical assessments, or dispensable prescriptions. For professional eye care and eyewear prescriptions, consult a licensed optometrist or ophthalmologist.
Ready to test your vision?
Start Your Screening →Comprehensive Screening Tests
Vision and hearing screening tests for families and teachers
Eye Screening
Comprehensive vision screening tests — results are screening only, not a diagnosis
Visual Acuity
Measure how clearly you can see at a distance using the standard Snellen chart
Color Vision
Screen for color vision deficiency using pseudoisochromatic plates
Astigmatism
Detect astigmatism using radial line patterns
Contrast Sensitivity
Measure ability to distinguish objects from background
Visual Field
Test peripheral vision and detect blind spots
Prescription Screening
Detect whether refractive correction may help — NOT a dispensable prescription
Stereoacuity (Depth Perception)
Screen binocular depth perception using random-dot stereograms (requires red-cyan glasses)
Pupillary Distance (PD)
Measure distance between pupils — screening only, not for ordering glasses
Vision Scan
Camera-based screening for alignment, motility, and convergence — Mobile App only
Hearing Screening
Pure-tone hearing screening — results are screening only, not a diagnosis
Hearing Screening
Basic pure-tone hearing screening at key frequencies with stereo testing
Accurate Results
Screening algorithms
Comprehensive
Vision and hearing screening
Device Compatible
Works on all devices
Secure & Private
Your data is protected
Built for Trust & Impact
Vision screening technology designed for global accessibility
Vision Screening Technology
Powered by computer vision and screen-based screening methods
- ✓Clinical validation study in progress
- ✓Advisory board of optometrists
- ✓Screening algorithms
- ✓Privacy-focused architecture
Privacy & Security
Your vision data stays private and secure
- ✓Browser-based processing
- ✓Camera used only during tests
- ✓Encrypted data transmission
- ✓We never sell your data
Accessible Globally
Designed for emerging markets and underserved communities
- ✓Works offline after initial load
- ✓Low bandwidth requirements
- ✓Multi-language support
- ✓Free and open access
Currently in Clinical Validation Study
Spect-IT is undergoing clinical validation with optometrists. This is a screening tool, not a diagnosis. Always consult a qualified eye care professional for definitive eye health assessment.
Medical Disclaimer: This tool is for informational purposes only and does not replace professional medical advice, diagnosis, or treatment.
⚠️ Important Medical Information
Screening only — not a diagnosis or dispensable prescription
This is a vision screening tool, not a medical diagnosis or dispensable prescription. Spect-IT provides screening estimates for informational purposes only. All results, including refractive screening estimates, are not dispensable prescriptions and cannot be used to order eyewear or contact lenses.
Vision screening is not a substitute for comprehensive professional eye care. Always consult with a licensed optometrist or ophthalmologist for clinical eye examinations, medical diagnoses, dispensable prescriptions, and treatment decisions.
When to see an eye care professional: Annual eye exams are recommended for everyone. Schedule an appointment if you notice vision changes, reduced acuity, eye strain, or if screening results indicate potential concerns.
🚨 Urgent signs requiring immediate medical attention:
- Sudden vision loss or significant vision changes
- Flashes of light or new floaters
- Eye pain, redness, or discharge
- Distortion or dark areas in central vision
Refractive screening disclaimer: Any refractive estimates (sphere, cylinder, axis) provided by Spect-IT are screening approximations only and NOT dispensable prescriptions. A licensed eye care professional must perform a comprehensive refraction and medical assessment before issuing a dispensable prescription for eyewear or contact lenses.