DynaVox EyeMax, User Manual

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Chapter 1: Introduction
4 DynaVox
L
IGHT
E
XPOSURE
The EyeMax contains light-emitting diodes (LEDs) that emit light in the near-infrared spectra.
This type of infrared (IR) light occurs naturally in sunlight and also in light from incandescent
lamps.
Several national and international organizations provide guidelines for human exposure to
optical radiation, and recommend exposure limits for the eye and skin. The most prominent
are: the American Conference of Governmental Industrial Hygienists (ACGIH)1-2 in North
America, and the International Commission for Non-Ionizing Radiation Protection (ICNIRP,
1997). In the European Union, there is an Optical Radiation Directive that employs the ICNIRP
exposure limits in the workplace. Other organizations recommend product-safety emission
limits (ANSI, 2005, 2000, 2007; CIE, 2002; CENELEC, 2002; IEC, 2007; CDRH, 1995).
Currently, there are two sets of product safety standards that apply to the use of lamps—
including solid-state lamps (LEDs) worldwide. These are:
• The CIE Lamp Safety Standard: CIE Standard S009/E-2002, Photobiological Safety of
Lamps and Lamp Systems.
• The EN 60825-1 Laser Product Safety Standard
The maximum level possible with the EyeMax in any setting never gets close to the emission
limits set by these standards. A person using the EyeMax during regular operation is exposed
to less than 0.1% of the accepted long-time exposure according to EN 60825-1/A1-A2. This
exposure is also well within the safety guidelines given in the book,
1996 TLVs and BEIs , by
the American Conference of Governmental Industrial Hygienists.