Dermatoscope - Riester ri-scope Mode D'emploi

7.4 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
Blue filter:
For L2 + L3, every filter can be switched to every aperture.
7.5. 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.
7.6. Magnifying glass
A magnifying glass with 5-fold magnification is supplied with the ophthalmos-
cope set. This can be positioned between the instrument head and the area
under examination, as required. The area under examination is magnified ac-
cordingly.
7.7. Technical data on the lamp
XL 2.5 V ophthalmoscope:
XL 3.5 V ophthalmoscope:
LED 3.5 V ophthalmoscope: 280 mA ave. life 10.000 h
8. Slit and spot retinoscopes
8.1 Purpose / indication
The slit/spot retinoscopes (also known as skiascopes) described in these Ope-
rating Instructions are produced to determine the refraction (ametropias) of the
eye.
8.2. Initial use 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 congru-
ent with the two projecting guide cams of the battery 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 fo-
cusing of the slit and/or spot image may now be effected by the knurled screw.
8.3. Rotation
The slit or spot image may be rotated by 360° by the control. Each angle may be
directly read from the scale on the retinoscope.
8.4. Fixation cards
Fixation cards are suspended and fixed on the object side of the retinoscope into
the bracket for the dynamic skiascope.
8.5 Technical data of the lamp
Slit retinoscope HL 2.5 V
Slit retinoscope XL 3.5 V
Spot retinoscope HL 2.5 V 2.5 V 450 mA
Spot retinoscope XL 3.5 V 3.5 V 640 mA

9. Dermatoscope

9.1. Purpose / indication
The ri-derma dermascope described in these Operating Instructions is pro-
duced for early identification of changes of skin pigmentation (malignant me-
lanomas).
9.2. 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 congru-
ent with the two projecting guide cams of the battery 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.
9.3. Focusing
Focus the magnifying glass by rotating the eyepiece ring.
9.4. Skin-friendly contact plates
2 skin-friendly contact plates are included:
1) With a scale of 0-10 mm for the measurement of pigmented lesions such as
malignant melanoma.
2) 2) Without scaling.
Both contact plates are easily removable and replaceable.
9.5 Technical data of the lamp
ri-derma XL 2.5 V
ri-derma XL 3.5 V
ri-derma LED 2.5 V 2.5 V 280 mA ave. life 10.000 h
ri-derma LED 3.5 V 3.5 V 280 mA ave. life 10.000 h
retinal reflections
for improved recognition of vascular abnormalities or
bleeding, for fluorescence ophthalmology
750 mA ave. life 15 h
690 mA ave. life 15 h
2.5 V 440 mA
3.5 V 690 mA
2.5 V 750 mA ave. life 15 h
3.5 V 690 mA ave. life 15 h
mean life span 15h
mean life span 50h
mean life span 15h
mean life span 40h
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