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SAFETY BULLETIN
This Bulletin was produced by the Laser Institute of America.
It can be freely copied and distributed without further permission from the LIA.
Mischief and kids go hand in hand at times. For example, when digital watches became
inexpensive enough for every school-aged child to have one, kids would use the glass faces
to shine patches of light at other students, teachers and objects.
Kids will be kids of course, and young people are doing the same thing in schools
across the country today using laser pointers. The difference is laser light from pointers
poses a much greater risk to the eye than the relatively primitive method used by children
in days past. The energy a pointer can direct into the eye is many times brighter than
staring directly at the sun.
Use and Misuse of Pointers
Commercial laser pointers are most commonly designed to assist speakers when giving
lectures or business presentations. A high-tech alternative to the retractable, metal
pointer, the laser pointer beam will produce a small dot of light on whatever object at
which it is aimed. It can draw an audiences attention to a particular key point in a
slide show.
Pointers are also used for other purposes such as the aligning of other lasers, laying
pipes in construction, and as aiming devices for firearms.
Much like the digital watches about 15 years ago, laser pointers have become very
affordable recently due to new developments in laser technology. They are widely available
at electronic stores, novelty shops, through mail order catalogs and by numerous other
sources. As inexpensive as $20 or even less, they are in the price range of other
electronic toys and are being treated as such by many parents and children. One woman
wrote the Laser Institute of America describing how other mothers she knew bought laser
pointers for their elementary-aged children so they could imitate Luke Skywalker and Darth
Vader and duel with them.
Laser pointers are not toys! This lesson was brought home to a small school district in
Wisconsin in the fall of 1996. A 16-year-old girl was illuminated in the eye from the
beams of laser pointers used as pranks. She experienced two momentary exposures, one while
performing a pom pom routine and again while walking down a hallway. She reported the
incidents to her parents, adding that after the first exposure, everything looked green;
after the second, she could temporarily not see out of her right eye.
While this is one of the most dramatic examples to date, there are numerous reports of
similar, momentary exposures across the U.S. and the U.K. While it seems clear such brief
exposures can cause only brief effects, there is no reason to ever shine a pointer towards
someone. The Laser Institute of America and the American Academy of Ophthalmology have
also received reports of people exposed for longer amounts of time, including two verified
retinal injuries caused by intentionally staring into pointers. For more information about
these incidents, AAOšs web site, www.eyenet.org,
should be consulted.
Laser experts agree that laser pointers should not be used to pull pranks. School
children are not the only ones finding mischievous uses for laser pointers. A Florida man
paid the price for such a prank when he was arrested for scanning the ground near an
off-duty police officer. The LaserInstitute of America has also received reports of
individuals shining laser pointers at athletes during sporting events and at people as
they are driving.
These types of incidents have started to spur government action. In November of 1997,
the U.K. banned a certain class of higher-powered pointer from sale. In December 1997, the
U.S. Food and Drug Administration issued its warning against allowing juveniles to use
them (see below).
The FDA requires manufacturers to place a warning on pointers, telling users not to
look into the beam. These warnings are small and easy to ignore, however, as evidenced in
widespread misuse of the devices.
Secondary Effects
Safety professionals are especially concerned about secondary effects, those
experienced during critical activities such as driving down a busy highway. If the driver
lost control due to either a split second visual effect or a psychological effect (startle
or panic), the consequences could be dire. There are reports of pilots who have had to
look away or hand control of a landing airplane over to a co-pilot after similar incidents
from more powerful light show lasers.
Laser experts agree that transient visual effects are possible and should be addressed.
These effects are called glare, flashblindness, and afterimage. While there are slight
differences in the definitions scientists use for these terms, they all refer to
some vision disruption that lasts only a few seconds or minutes. The Laser Institute of
America has received one report where exposure to a laser pointer startled a bus driver
resulting in a traffic accident.
People often have strong psychological reactions to being illuminated with a laser
beam. One researcher found that at times people receive eye injuries, not from the beam
itself, but by a strong response that includes vigorously rubbing or sticking their
fingers in their eye.
Laser pointers are making their way into the public consciousness. Unfortunately, in
one of the last episodes of the popular TV series "Seinfeld" in May, 1998, the
lovable neurotic George is pursued through the streets of New York by a laser
pointer-wielding prankster.
The Laser Institute of America feels that further regulation of laser pointers should
now be considered. One viable option is to further limit the power that laser pointers can
emit.
Education is also key. By informing parents, teachers and society at large about the
potential hazards laser pointers present, any risks posed by them can be minimized, and
the devices can continue to be used properly and safely, as primarily intended.
The LIA hopes that through its efforts, and those of its members and affiliated
organizations, inappropriate and irresponsible uses of laser pointers are discouraged.
Send mail to info@lcaplaser.com with questions
or comments about this web site.
Copyright Š 2002 L-Cap Laser Inc.
Last modified: December 30, 2002 |