This information in this article has been taken from a number of sources:

The Royal National Institute of the Blind (RNIB)
Issue 35 of Dyslexia Parent magazine
The British Dyslexia Association
The University Of Manchester’s Web Accessibility Guidelines
WebAIM (Web Accessibility In Mind)
my own prior knowledge.

What problems would a dyslexic user face?
People with dyslexia frequently experience discomfort when reading because [...]

and all throughout the house, Jack was wandering about, banging his shins off everything and swearing under his breath.
Why, you may very well ask.