8
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
DEUTSCH
ENGLISH
FRANÇAIS
ITALIANO
ESPAÑOL
NEDERLANDS
PORTUGUÊS
SVENSKA
© HAAG‑STREIT AG, 3098 Koeniz, Switzerland ‑ HS Doc. no. 1500.7220343.04070 – 7. Edition / 2016 – 11
2.10 Chin rest
The chin rest (and thus the position of the patient's head) is adjusted with the four
buttons. Fine adjustment can also be performed at the control unit (PC) using the
mouse. Sensors in the chin rest detect the correct position of the patient's head.
There is an optional attachment for the chin rest for examining children.
(HS Part Number 1820075)
2.11 Swing arm
An automatic swing arm allows the refractive lens holder to be turned in and out
during the examination without changing the position of the patient. This swing arm
can be operated with the computer mouse at either the control panel or on the con-
trol unit. Once the refractive lens holder has been swung in, it can be finely adjusted
to the correct distance from the eye being examined.
NOTE!
Always use the control panel buttons on the appliance or PC to swing
the refractive lens holder in or out. Do not attempt to move the refrac
-
tive lens holder manually.
2.12 Refractive lens holder
Refractive lenses can be used during examinations with 30° eccentricity. The corre
-
sponding lenses are inserted before the examination. The refractive lens holder can
be tilted forward by about 25° to make it easier to change the refractive lenses.
2.13 Patient-response button
The patient-response button is connected to the bottom of the forehead rest holder
(RJ11 plug connection).
2.14 Network connection
The Ethernet port is located at the back of the appliance. Always use a shielded cat-
egory 5e cable which enables transmissions of 100 MHz without interference. This
network connection is electrically isolated and has a dielectric strength of 4 kV ac-
cording to EN 60601-1.
2.15 Light sources
LEDs are installed for periphery or background illumination, fixation assistance and
stimulus. LEDs emit very low amounts of heat, so active cooling is not required.
2.16 Light intensities
The light intensity of stimulus and periphery is measured with independent light sen-
sors and adjusted to the preset nominal values each time the Perimeter is switched
on.
2.17 Stimulus
The stimulus light is projected indirectly into the cupola via a mirror unit. Five differ
-
ent diaphragm diameters can be selected in the user-defined programs. The atten
-
uation of the stimulus intensity is infinitely adjustable via an electronic control unit.
Stimulus presentations of 100-500 ms are permitted. A mechanical lock and optical
damping elements are no longer required.
White stimulus for W/W perimetry and optionally blue and red stimulus for B/Y and
R/W are possible. The stimulus intensity is detected using a light sensor, which also
serves as reference point for the system of coordinates of the test zones. The stim
-
ulus LED has a service life of >30,000 h and is thus maintenance-free.
2.18 Periphery or background illumination
The white background brightness amounts to 31.4 or 4 asb for W/W perime-
try. You can also select a yellow background with 314 asb for B/Y perimetry. The
background brightness consists of two light sources, each equipped with several
LEDs. The background LEDs have a service life of >30,000 h and are thus mainte
-
nance-free. The background brightness is measured by a separate light sensor.
2.19 Fixation marks
Three different fixation marks can be selected and their brightness changed elec
-
tronically in 10 steps. A green LED, which is maintenance-free and has a service life
of >30,000 h, serves as light source.
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