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:

  1. Choose a simulation mode such as myopia-like blur, astigmatism-like distortion, glare, or reduced contrast.
  2. Adjust sliders slowly and compare with the clear baseline.
  3. Read the caveats under each mode.
  4. 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

Sources & references

  1. Refractive Errors National Eye Institute (NEI/NIH) Accessed 2026-08-09 Authoritative overview of myopia, hyperopia, astigmatism, and related focusing errors.
  2. Eye Health A–Z American Academy of Ophthalmology (AAO) Accessed 2026-08-09 Patient education library for eye health topics.
  3. Eye Care MedlinePlus / National Library of Medicine (NIH) Accessed 2026-08-09 Consumer eye-care overview with curated links.
  4. Computers, Digital Devices and Eye Strain American Academy of Ophthalmology (AAO) Accessed 2026-08-09 Digital eye strain and workstation guidance.