The phrase "eyeball test" is when you judge or observe something based on what you can see with your own eyes, without using any special tools or measurements. Full definition
He does give the ol' eyeball test a run for the money though. (sbnation.com)
Beyond failing the human eyeball test, these errors can keep people from finding you online by mucking up your Personal SEO, a key element in today's executive job search. (executivecareerbrand.com)