So the tables submitted by Tourist appear to show that the FAA consider that eye damage is unlikely to occur with a strike from a 5 watt green laser at ranges over 250 metres. Green laser light is the wavelength at which the eye is most sensitive, and the most likely to cause physical damage. Higher powered devices exist but are not likely to be portable or handheld and therefore unlikely to be deliberately pointed at an aircraft.
The main hazards of flash blindness, dazzle and distraction exist out to far greater ranges, but pilots should at least be reassured that they are extremely unlikely to suffer permanent injury as a result of a laser being shone in their direction.
The consequences of the other effects are far more difficult to assess and depending on circumstances, could be fatal. So no cause for complacency.