Visual Disabilities
These include, but are not limited to, blindness, color blindness, and low vision. Color blindness includes red-green, blue-yellow and total color blindness. Low vision can be caused by eye diseases, such as macular degeneration, glaucoma, diabetic retinopathy and retinitis pigmentosa. It can also be caused by injury or aging (e.g. blurriness of vision).
Summary of Best Practices
- Describe images
- Use good color contrast and legible fonts
- Use color in combination with shapes and or text when color is an indicator
- Provide transcripts for videos
- Provide descriptive and informative headings
- Provide descriptive and informative links
- Follow a linear and logical layout
- Use proper semantics (e.g. paragraphs, headings, lists, tables)
- Build assuming users can only use a keyboard; do not assume they can use a mouse
- Don't force users to open documents outside webpages for all their information