There are different levels in dyslexia. I have never seen any type of font for programming that is also designed for dyslexics. There is Open Dyslexic Font (open source) that was created for general purposes. I myself do not have dyslexia, so I do not know if there is a need for programming fonts designed for dyslexics.

See this theme as a mad experiment. Open Dyslexic or Comic Sans in a code editor? There is always someone who finds it useful (or not).

The theme makes use of low contrast and font Open Dyslexic * (https://github.com/antijingoist/open-dyslexic) with fallback to Comic Sans. It may not look pretty.

*The font Open Dyslexic must be installed on your system. 
(Download: https://github.com/antijingoist/open-dyslexic or http://dyslexicfonts.com/)