WCAG Standards for Visual Impairments
Full Standards: WCAG 2.1
Simple Standards: WCAG for people who haven't read them
Introduction to the Principles
- Perceivable: Web content is made available to the senses - sight, hearing, and/or touch
- Operable: Interface forms, controls, and navigation are operable.
- Understandable: Information and the operation of user interface must be understandable.
- Robust: Content must be robust enough that it can be interpreted by a wide variety of user agents, including assistive technologies
Synopsis of Standards
Principle 1: Perceivable
Guideline 1.1: Text Equivalent
"Provide text alternatives for any non-text content so that it can be changed into other forms people need, such as large print, braille, speech, symbols or simpler language."Guideline 1.2: Time Based Media (Audio/Video)
"Provide alternatives for time-based media."Guideline 1.3: Adaptable
"Create content that can be presented in different ways (for example simpler layout) without losing information or structure."Guideline 1.4: Distinguishable
"Make it easier for users to see and hear content including separating foreground from background."
Principle 2: Operable
Guideline 2.1: Keyboard Accessible
"Make all functionality available from a keyboard."Guideline 2.2: Enough Time
"Provide users enough time to read and use content."Guideline 2.3: Seizures
"Do not design content in a way that is known to cause seizures."Guideline 2.4: Navigable
"Provide ways to help users navigate, find content, and determine where they are."
Principle 3: Understandable
Guideline 3.1: Readable
"Make text content readable and understandable."Guideline 3.2: Predictable
"Make Web pages appear and operate in predictable ways."Guideline 3.3: Input Assistance
"Help users avoid and correct mistakes."
Principle 4: Robust
Guideline 4.1: Compatible
“Maximize compatibility with current and future user agents, including assistive technologies.”