Design for Dyslexia: Typography:

http://lindseybell.com/dyslexia/typography.html

Design for Dyslexia: Typography:

Typography is an important element to consider when designing for people with dyslexia in mind. Since dyslexia effects how the brain interprets the symbols on a page, it is important to make symbols, in this case letters and words, as visually clear as possible. To do so, first choose a font that has clear letter shapes and is easy to read on screen. Good fonts to use include Helvetica, Arial and Verdana. Try to avoid a font with serifs for content text. If you are building a site that will have a lot of text, it can be helpful to have a way for the user to choose the font they prefer to read.

Second, use a font size that is large enough to read at the default setting and allow users to easily scale the text, either through the browser's built in scaling or through a scaling method built into the website itself, using javascript. Using percentage or ems to size fonts allows users to easily scale text size.

Additionally, there should be enough "breathing room" between lines between lines to make it easier for the viewer to scan lines without getting the letters jumbled.