I got such a laser during a visit to China. Unlike normal high-power lasers, that turned out to be a normal green laser pointer with its current source set to a ridiculous current. It only lasted for a day or two...go figure. You can build your own, I have seen HeNe, Nitrogen, CO2 lasers as well as YAG and sapphire crystals on ebay.
Speaking of eyes, here is a 'proper' eye diagram on a Hameg scope. X-Y mode, AM sine wave through capacitor. Look what engineers do at 1:42 am!