For the first five months of 2010, unique visitors to All About Vision from non-paid sources grew 41%, compared with the same period last year.

Non-paid traffic comprises three areas:

• Visitors who click on natural or “organic” search engine results.
• Traffic from referring websites, such as eye care practice or media outlet sites.
• Direct navigation — people who type allaboutvision.com into their browser.

In May, 98% of the site’s traffic was non-paid.  All About Vision has served more than 5.3 million unique visitors, measured weekly by Google Analytics, in the first five months of 2010.