The world is full of devices associated with the word ergonomic. A scholar trying to learn the word by studying the way it’s used in today’s culture is likely conclude that it means “curvy” or possibly “funny-looking.” Nearly all mice, trackballs, and other devices are now described as ergonomic; this doesn’t mean they’re all good for you to use.
Unfortunately, unless you use a given gizmo for a few hours, it’s hard to get a feel for how it will work for you. Still, experimentation is the tried-and-true method to determine the level of ergonomic satisfaction you will get from a device. —Peter Seebach —Tools to keep the user from being hurt (IBM)