Are Laser Pen/laser Pointing Devices Safe?

Any device which incorporates a laser whether for pointing, measuring or calibrating is potentially dangerous and quite definitely not a toy.

When you first obtain a laser pen, pointing device or level, always read the manufacturer's instructions carefully before use. No-one likes reading instructions or manuals, but always do so with any laser-emitting device to avoid injuring yourself or others.

Remember the laser beam emitted, albeit weak in comparison with full-scale industrial lasers, can still cause irreparable damage to the eyes if shone directly into someone's face for a sustained period. Around 90 seconds or less can be sufficient to cause permanent damage to the retina. Even a short glance directly at a laser source can cause temporary flash blindness similar to that invoked by welding or flash photography.

The following, in conjunction with the manufacturer's recommendations, should help avoid accidents:
• Never shine a laser through binoculars or a telescope
• Always switch the device off as soon as you are finished
• Think carefully about where you are using a laser device and avoid shining the laser near glass or mirrored surfaces
• Do not use your laser device for any purpose not intended by the makers.

They are safe if you just be careful where you put it,where you point it,and what you do with it.