There are exemptions that allow copying for people with a disability (including visual impairment conditions such as dyslexia) see detailed information in essentials links.
However, the CLA Licence also covers the making of accessible copies (both paper and digital) for people with a disability (including visual impairment conditions such as dyslexia) that affects their ability to read or access content. This can include both single and multiple copies especially if there is a group of students with very similar accessibility needs.
If accessible copies are made under the Licence, then the following should be noted:
Note: any accessible copy made under the Licence does not need reporting to the CLA