Disclaimer

Not medical advice

VisualFieldTracker is a free experimental beta intended for personal self-observation, exploration and communication. It has not been clinically validated or undergone conformity assessment as a medical device. It does not provide medical advice, diagnosis, screening or treatment and cannot determine whether your vision or a medical condition has improved, worsened or remained stable. It is not a substitute for examination by a qualified eye-care professional.

Test results and comparisons

Results can be affected by viewing distance, fixation, lighting, display characteristics, browser behaviour, input method, fatigue, and other conditions. A saved test, change in marked spots, or comparability score must not be interpreted, whether considered alone or with other Visual Field Tracker sessions, as evidence that a medical condition has improved, worsened, or remained stable.

The comparability score describes technical similarity between test sessions. It is not a clinical score and has not been validated as a measure of disease progression.

On-screen dimensions and visual-angle guides are approximate. Correct screen calibration and viewing distance can improve their consistency but do not make the output clinically accurate or comparable with professional perimetry.

Vision Simulation is an illustrative communication feature based on user-recorded points. It does not reproduce how a person actually sees or establish the presence or extent of visual-field loss.

Professional care

Discuss concerns about your sight or test results with an appropriate healthcare professional. Do not delay or change professional care because of information produced by this application.

If you experience sudden vision loss, a sudden change in vision, eye injury, severe eye pain, or another urgent symptom, seek urgent medical assistance through the services available in your location.

Technical limitations

Although reasonable care is taken in developing the application, uninterrupted operation and the accuracy, completeness or reproducibility of experimental outputs cannot be guaranteed.