Table 2 WebAIM
From: Compliance with web content accessibility guidelines in ophthalmology social media posts
A—Bare minimum accessibility | |
1. | Descriptive and informative post title |
2. | Content is presented in simple layouts using tables or text labels, for example, and the reading and navigation order makes sense |
3. | Colors are not the sole method of conveying content |
4. | Images have appropriate, equivalent alternative text or captions OR videos have appropriate audio descriptions or captions |
5. | Contrast between the background and foreground is at least 3:1 |
AA—Accessibility Meeting Legal Requirements | |
6. | Contrast ratio is at least 4.5: 1 (unless it is large text at least 18pt or 14pt + bold which can have 3:1) |
7. | If the same visual presentation can be made using text alone, an image is not used to present that text |
8. | Avoid duplicating heading or label text unless the structure provides adequate differentiation between them |
AAA—Exceeds accessibility requirements | |
9. | Contrast ratio is at least 7:1 (or if 18pt or 14pt + bold, the contrast ratio is at least 4.5:1) |
10. | If post is part of a sequence of posts, there is an indication of the current page location (eg. post 2 of 3) |
11. | Individual sections of content are designated using section headings beyond providing an overall document structure |
12. | Words that may be unfamiliar, ambiguous, or used in a very specific way are defined through adjacent text, a definition list, or glossary |
13. | The meaning of an unfamiliar abbreviation is provided by expanding it the first time it is used |
14. | A more understandable alternative is provided for content that is more advanced than can be reasonably read by a person with 9 years of primary education |
15. | An included image does not convey content OR is used when the information cannot be presented with text alone |
16. | IF AUDIO: Audio with speech has no or very low background noise so that speech is easily distinguished |
