Of Course This Optometrist's Business Card Doubles As an Eye Test

Here's a brilliant way to drum up new business if you're an optometrist. Myung Dong, an eye doctor in Jeju, South Korea, found the perfect way to convince the local elderly population that they could benefit from glasses or other vision treatments: a business card featuring a self-administered eye test.

It was an incredibly cheap but effective way for the optometrist to market its services, since it showed the local residents they indeed had vision problems without requiring them to come for an examination. And after the cards were distributed, over 90 percent of the town's residents visited the optometrist for a checkup within the first month. That's impressive. [Ads of the World via Taxi]