Educational Calculators
Vision Simulator (Educational)
Illustrative simulations of blur, astigmatic distortion, glare, and contrast reduction for learning only.
Overview
Simulators help students and patients imagine how blur, astigmatic stretch, glare, or reduced contrast might look. Real perception varies widely and cannot be perfectly reproduced on a flat screen.
All modes are labeled illustrative. They are not diagnostic images of your eyes.
How to use this tool
Follow these educational steps:
- Choose a simulation mode such as myopia-like blur, astigmatism-like distortion, glare, or reduced contrast.
- Adjust sliders slowly and compare with the clear baseline.
- Read the caveats under each mode.
- Use insights to describe symptoms at an appointment — for example, “headlights smear horizontally.”
Interactive tool
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What results can mean
If a mode resembles something you notice while driving at night or reading, that qualitative match can improve communication with a clinician. It still does not identify the cause.
What results do not mean
Not a test result. Not proof you have myopia, cataract, or macular disease.
Not suitable for scaring yourself into unnecessary emergency visits — use proportionate symptom guidance instead.
Limitations
Important limitations:
- Depth, motion, and binocular vision are poorly captured on a 2D display.
- Migraine aura and neurological phenomena are not simulated accurately here.
When to see an eye-care professional
Persistent real-world distortion, glare that is new, or blur that does not clear with blinking deserves an exam. New curtains, flashes, or sudden vision loss need urgent care.
Frequently asked questions
Because your optical system, brain processing, and environment differ from a browser filter.
Only in a crude illustrative way; cataract symptoms vary and need clinical diagnosis.
No. Tear film, refractive error, lens coatings, and other causes exist.
With adult context for education; symptoms in children still need professional care.
Sources & references
- Refractive Errors National Eye Institute (NEI/NIH)
- Eye Health A–Z American Academy of Ophthalmology (AAO)
- Eye Care MedlinePlus / National Library of Medicine (NIH)
- Computers, Digital Devices and Eye Strain American Academy of Ophthalmology (AAO)