Is it possible to implement a reading rule for focus reading?

Hi community,
after knowing how a reading rule helps to the people with Dyslexia, I discover these websites:

  • How to use the Free Dyslexia ruler extension - Helperbird

  • Pixie dyslexia friendly reading rule

  • Moon+ Reader Pro 9.3 - reading rule for focus reading

And I wonder myself… Okular could implement this tool?

Thank you!!

You might be able to use KRuler for this.