Preparing tool
How to use Refractive Error Simulator
- Add a screenshot, slide or menu, or try the sample.
- Choose short sight, reading-age blur or astigmatism (with its axis) and a strength.
- Check how much fine detail is kept and export the comparison.
What are the limits of Refractive Error Simulator?
Defocus is approximated with blur; the real effect depends on distance and pupil size. Not an eye test. The image stays on your device.