Original sentence: A 6-watt green (532 nm) laser with a 1.1 milliradian beam divergence is an eye hazard to about 1,600 feet (488 meters), can cause flash blindness to about 8,200 feet (1.5 mi/2.5 km), causes veiling glare to about 36,800 feet (7 mi/11.2 km), and is a distraction to about 368,000 feet (70 mi/112 km).A blue or red laser will appear much dimmer -- and thus less distracting -- than a green or yellow laser of equal power (wattage).At higher power levels, the spots may be in the central vision -- in the same area where the original light was viewed.For example, it shows that the areas of most concern -- eye damage, flash blindness and glare -- occur relatively close to the aircraft.For non-visible lasers (infrared and ultraviolet), the irradiance at the aircraft must be eye-safe -- below the Maximum Permissible Exposure level for that wavelength.In general, the eyes of pilots in an illuminated nighttime cockpit are most sensitive to greenish-yellow light (of wavelength around 500–600 nanometers, peaking at 555 nm).In the UK, restrictions are in place in a zone that includes a circle 3 NM (5.5 km) in radius around an aerodrome (airport) plus extensions off each end of each runway.The runway zones are rectangles 20 NM (37 km) in total length and 1000 meters (3280 feet) wide, centered about each runway.There may be afterimages -- again, exactly like a bright camera flash leaving temporary spots.To give a specific example, a 10-watt continuous-wave YAG laser at 532 nanometers (green), can appear brighter to the eye than an 18-watt continuous-wave argon-ion laser that outputs 10 watts of 514 nm (green-blue) light plus 8 watts of 488 nm (blue) light.To give another example, here are calculations of a more powerful laser -- the type that might be used in an outdoor laser show
Edited sentence: A 6-watt green (532 nm) laser with a 1.1 milliradian beam divergence is an eye hazard to about 1,600 feet (488 meters), can cause flash blindness to about 8,200 feet (1.5 mi/2.5 km), causes veiling glare to about 36,800 feet (7 mi/11.2 km), and is a distraction to about 368,000 feet (70 mi/112 km).A blue or red laser will appear much dimmer—and thus less distracting—than a green or yellow laser of equal power (wattage).At higher power levels, the spots may be in the central vision—in the same area where the original light was viewed.For example, it shows that the areas of most concern—eye damage, flash blindness and glare—occur relatively close to the aircraft.For non-visible lasers (infrared and ultraviolet), the irradiance at the aircraft must be eye-safe—below the Maximum Permissible Exposure level for that wavelength.In general, the eyes of pilots in an illuminated nighttime cockpit are most sensitive to greenish-yellow light (of wavelength around 500–600 nanometers, peaking at 555 nm).In the UK, restrictions are in place in a zone that includes a circle 3 NM (5.5 km) in radius around an aerodrome (airport) plus extensions off each end of each runway.The runway zones are rectangles 20 NM (37 km) in total length and 1000 meters (3280 feet) wide, centered about each runway.There may be afterimages—again, exactly like a bright camera flash leaving temporary spots.To give a specific example, a 10-watt continuous-wave YAG laser at 532 nanometers (green), can appear brighter to the eye than an 18-watt continuous-wave argon-ion laser that outputs 10 watts of 514 nm (green-blue) light plus 8 watts of 488 nm (blue) light.To give another example, here are calculations of a more powerful laser—the type that might be used in an outdoor laser show