What We Do:

We can help you become an explanation specialist.

Common Craft Membership

Start your life as an explainer with Common Craft Membership. Prices start at just $49 per year. It provides:


Make your presentation or video remarkable with 800+ digital images in Common Craft Style, plus Know-How resources for using them.

Download a Sample

Ready-made Videos:

Educate others with 50+ ready-made video explanations that you can embed on your website or download for offline use.

Test embedding a video

We Wrote the Book on Explanation

The Art of Explanation

A book by Lee LeFever

The Art of Explanation will help you become an explainer.

Learn More

Need a Video for Your Product?

The Explainer Network

Our network of custom video producers can create short, animated videos that make your product or service easier to understand.

Find a Producer

This blog is where we announce new videos & talk about the power of explanation & the change it can create. 

Would You Share Your Retina Online?

Robin Hamman just got new glasses and at the same time, had high-res digital scans of his retinas...

Today, about a month later, I've finally received an email with those images attached and they're really beautiful. Not just because they contain a view of my own eyes that I've never been able to see before or, indeed, because my eyes are in any way particularly lovely or different from the next person's. But from a "isn't biology wonderful" and "hey, check this out" perspective, I'd love the post the photos here and/or on flickr.

The question is, should I?

According to BiometricNewsPortal, retina scans have an error rate of one in 10 million in comparison to fingerprinting which can result in an error rate as bad as 1 in 500. The site also says that:

"retina biometrics systems are suited for environments requiring maximum security, such as Government, military and banking. Retina biometric systems have been in use for military applications since the early seventies..."

...I'm thinking that, as cool as those retinal images might be, it could very well be a bad idea to post them online. In fact, I should probably be emailing the optician to request that they delete the images.


I can't say I've ever thought about such a thing, but I think Robin has a point. As much as I share online, I think something like a retinal scan could be a risk that could come back to bite you in the future.