http://casereports.bmj.com/content/2...2008.0724.full

This may be of interest. It's a screening test for MG (that means that if you test positive, it doesn't mean you have MG, but that you should be tested for it).

It's a very simple test: you blink your eyes as quickly as you can for one minute. Typically, if you have MG, at the end of the minute it will be hard to open your eyes. But if you close them and rest them for two minutes, you regain strength.

Abby