Laser Safety Eyewear
In
order
to
adequately
protect
the
eyes
of
all
persons
in
the
treatment
room,
all
occupants
must
wear
safety
glasses
with
a
minimum
O.D.
of
4.0
at
800
‐
840
nm.
Verify
that
the
safety
glasses
chosen
for
use
with
the
SL/SLx
are
appropriate
for
use
by
checking
the
O.D.
and
wavelength
rating
on
the
frames.
Additional
glasses
may
be
purchased
through
IRIDEX.
Determining When Safety Eyewear is Required
Safety
eyewear
is
required
when
the
laser
is
in
use
and
individuals
are
physically
located
inside
the
Nominal
Ocular
Hazard
Distance
(NOHD).
The
NOHD
is
the
maximum
distance
from
the
laser
at
which
damage
to
the
eye
can
occur.
Any
individuals
within
this
distance
from
the
laser
must
wear
protective
eyewear
or
risk
unintended
eye
damage.
The
NOHD
varies
depending
upon
the
type
of
delivery
device
attached
to
the
SL/SLx.
The
formula
to
calculate
worst
case
NOHD
is
given
by
the
following:
⎟
⎠
⎞
⎜
⎝
⎛
⋅
Φ
⋅
⎟
⎠
⎞
⎜
⎝
⎛
=
MPE
A
N
π
.
.
7
.
1
NOHD(m)
Where:
N.A.=
equals
the
Numerial
Aperture
of
the
delivery
device
MPE:
equals
the
Maximum
Permissible
Exposure
(level
of
laser
radiation
to
which
a
person
may
be
exposed
without
suffering
adverse
effects),
expressed
in
watts
per
square
meter
(W/m
2
)
Φ
:
equals
the
maximum
power
available
for
each
delivery
device,
expressed
in
watts
(W)
OcuLight SL/SLx Operator Manual
PN 13099D-EN
32
