1. Missing Alt Text: Failing to include descriptive alt text for images leaves visually impaired users guessing the content. 2. Poor Color Contrast: Text that blends into the background can be difficult to read for users with visual impairments. 3. Non-Descriptive Links: Using phrases like "click here" instead of descriptive text can confuse users relying on screen readers. 4. Inflexible Layouts: Fixed layouts that don't adapt to different screen sizes can make it difficult for users with visual impairments to read the content.