Dyslens is a open source chrome extension, built and designed to make web more accessible for people who have different reading needs and suffering with dyslexia.
https://chrome.google.com/webstore/detail/dyslens/mpbkfbafkpkbpmgdcgkmonpfnodgfepo
Reader can change the text settings of the screen.
Reader can put an overlay and dim the brightness.
Reader can put an overlay and dim the brightness.
You can find brief technical details in this document TechStuff