Riester ri-former Instructions D'utilisation page 19

Screw the specula clockwise until noticeable resistance is felt. To re-
move the specula, screw the specula counter clockwise.
L3 otoscope:
Fit the chosen specula on the chrome-plated metal fixture of the oto-
scope until it locks into place. To remove the specula, press the blue
ejection button. The specula is automatically ejected.
6.1.3 Swivel lens for magnification
The swivel lens is fixed to the device and can be swivelled 360°.
6.1.4 Insertion of external instruments into the ear
If you wish to insert external instruments into the ear (e.g. tweezers),
you have to rotate the swivel lens (approx. 3-fold magnification) located
on the otoscope head by 180°. Now you can use the operation lens.
6.1.5 Pneumatic test
To perform the pneumatic test (= examination of the eardrum), you re-
quire a ball, which is not included in the normal delivery package, but
can be ordered separately. The tube for the ball is attached to the con-
nector. Now you can carefully insert the necessary volume of air into
the ear canal.
6.1.6 Technical data of the lamp
Otoscope XL 2.5 V 2.5 V 750 mA ave. life 15 h
Otoscope XL 3.5 V 3.5 V 720 mA ave. life 15 h
Otoscope LED 2.5 V 2.5 V 280 mA ave. life 10.000 h
Otoscope LED 3.5 V 3.5 V 280 mA ave. life 10.000 h
6.2 ri-scope®L ophthalmoscopes
6.2.1 Intended use
The Riester ophthalmoscope described in these Operating Instructions
is produced for the examination of the eye and the eyeground.
Attention!
Because prolonged intense exposure to light can damage
the retina, the use of the eye exam device should not be un-
necessarily prolonged, and the brightness setting should
not be set higher than needed for a clear representation of
the target structures.
The irradiation dose of the photochemical exposure to the
retina is the product of irradiance and duration of irradia-
tion. If the irradiance is reduced by half, the irradiation time
may be twice as long to reach the maximum limit.
Although no acute optical radiation hazards have been iden-
tified for direct or indirect ophthalmoscopes, it is recom-
mended that the intensity of light directed into the patient's
eye be reduced to the minimum required for examination /
diagnosis. Infants / children, aphasics and people with eye
diseases are at a higher risk. The risk may be increased if
the patient has already been examined with this or another
ophthalmological instrument during the last 24 hours. This
is especially true when the eye has been exposed to retinal
photography.
The light of this instrument may be harmful. The risk of
eye damage increases with the duration of irradiation. An
irradiation period with this instrument at maximum inten-
sity of longer than >5 min. exceeds the guideline value for
hazards.
This instrument does not pose a photobiological hazard ac-
cording to DIN EN 62471 but still features a safety shutdown
after 2 / 3 minutes.
6.2.2 Lens wheel with correction lens
The correction lens can be adjusted on the lens wheel. The following
correction lenses are available:
L1 and L2 ophthalmoscopes:
Plus: 1-10, 12, 15, 20, 40.
Minus: 1-10, 15, 20, 25, 30, 35.
L3 ophthalmoscope:
Plus: 1-45 in single steps
Minus: 1-44 in single steps
The values can be read off in the illuminated field of view. Plus values
are displayed in green numbers, minus values with red numbers.
6.2.3 Apertures
The following apertures can be selected with the aperture hand-wheel:
L1 ophthalmoscope:
Semi-circle, small/medium/large circular aperture, fixation star, slit.
L2 ophthalmoscope:
Semi-circle, small/medium/large circular aperture, fixation star and slit.
L3 ophthalmoscope:
Semi-circle, small/medium/large circular aperture, fixation star, slit and
grid.
Aperture Function
Semicircle: for examinations with turbid lenses
Small circle: to reduce reflections for small pupils
Medium circle: to reduce reflections for small pupils
Large circle: for normal examination results
Grid: for topographic determination of retina
changes
Light slit: to determine differences in level
Fixation star: to ascertain central of eccentric fixation
6.2.4 Filters
Using the filter wheel, the following filters can be switched for each
aperture:
L1 ophthalmoscope Red-free filter
L2 ophthalmoscope Red-free filter, blue filter and polarisation filter.
L3 ophthalmoscope Red-free filter, blue filter and polarisation filter.
Filter Function
Red-free filter: contrast enhancing to assess fine vascular changes,
e.g. retinal bleeding
Polarisation filter: for precise assessment of tissue colours and to avoid
retinal reflections
Blue filter: for improved recognition of vascular abnormalities or
bleeding, for fluorescence ophthalmology
For L2 + L3, every filter can be switched to every aperture.
6.2.5 Focussing device (only with L3)
Fast fine adjustment of the examination area to be observed is achieved
from various distances by turning the focussing wheel.
6.2.6 Magnifying glass
A magnifying glass with 5-fold magnification is supplied with the opht-
halmoscope set. This can be positioned between the instrument head
and the area under examination, as required. The area under examina-
tion is magnified accordingly.
6.2.7 Technical data on the lamp
XL 2.5 V ophthalmoscope: 750 mA ave. life 15 h
XL 3.5 V ophthalmoscope: 690 mA ave. life 15 h
LED 3.5 V ophthalmoscope: 280 mA ave. life 10.000 h
6.3 Slit and spot retinoscopes
6.3.1 Intended use
The slit/spot retinoscopes (also known as skiascopes) described in
these Operating Instructions are produced to determine the refraction
(ametropias) of the eye.
6.3.2 Commissioning and function
Position the required instrument head on point of attachment on top
section of handle with both recesses of the instrument head bottom
section being congruent with the two projecting guide cams of the bat-
tery handle. Press instrument head lightly on battery handle and rotate
handle in clockwise direction to the stop. Remove head by rotating in
counter-clockwise direction. Rotation and focusing of the slit and/or
spot image may now be effected by the knurled screw.
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