Imagery:
Images are useful to break up content within a page. Images should enhance understanding of content.
For example, here is an image that might be used in content about Philadelphia & baseball:
While this might be descriptive to most people, people with dyslexia might have problems connecting the logo to the sport. A better image might be this:
Additionally, it is important to make use of the alt tag when displaying images. This will allow users who browse the web with screen readers to understand the image shown on the web page.
Video can be useful to enhance a user's understanding of content, but the video should not auto-play.
Another useful visual is the use of graphs, to help users understand any charts that may be on a page. It can be hard for people with dyslexia to process numbers, so having visual clues about the information contained in a chart can help the user comprehend the information.
