F-Shaped Pattern For Reading Web Content

It's fascinating to watch the slow-motion replay of users' eye movements as they read and scan across a page. Every page has reading issues beyond the dominant F pattern I'm discussing here. For example, users scan in a different, more directed way when they’re looking for prices or other numbers, and an interesting hot-potato behavior determines how users look at a list of search engine ads. We also have many findings on how people look at website images.

http://www.useit.com/alertbox/reading_pattern.html