Several factors can contribute to visual fatigue in email marketing:
1. Poor Design: Overly complex layouts, clashing colors, and too many fonts can overwhelm the eyes. 2. Excessive Content: Emails packed with too much information, long paragraphs, or heavy imagery can cause eye strain. 3. Lack of White Space: Insufficient white space makes the email appear cluttered and difficult to read. 4. Improper Use of Images: Large images or animated GIFs can slow down loading times and strain the eyes.