Slit And Spot Retinoscopes; Dermatoscope - Riester ri-scope Instructions Manual

4.4 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
Red-free filter:
Polarisation filter:
Blue filter:
For L2 + L3, every filter can be switched to every aperture.
4.5. 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.
4.6. 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.
4.7. Technical data on the lamp
XL 2.5 V ophthalmoscope:
XL 3.5 V ophthalmoscope:
LED 3.5 V ophthalmoscope:

5. Slit and spot retinoscopes

5.1 Purpose
The slit/spot retinoscopes (also known as skiascopes) described in these Ope-
rating Instructions are produced to determine the refraction (ametropias) of the
eye
5.2. 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.
5.3. 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.
5.4. Fixation cards
Fixation cards are suspended and fixed on the object side of the retinoscope into
the bracket for the dynamic skiascope.
5.5 Technical data of the lamp
Slit retinoscope HL 2.5 V
Slit retinoscope XL 3.5 V
Spot retinoscope HL 2.5 V
Spot retinoscope XL 3.5 V

6. Dermatoscope

6.1. Purpose
The ri-derma ®
duced for early identification of changes of skin pigmentation (malignant me-
lanomas).
6.2. 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.
6.3. Focusing
Focus the magnifying glass by rotating the eyepiece ring.
6.4. Skin adapters
Two skin adapters are supplied:
1) Including a scale of 0 - 10 mm for measuring melanotic skin changes, such
as malign melanoma.
2) Without a scale Both skin adapters are suitable for multiple removal and
replacement.
18
Function
contrast enhancing to assess fine vascular changes, e.g.
retinal
bleeding
for precise assessment of tissue colours and to avoid
retinal reflections
for improved recognition of vascular abnormalities or
bleeding, for fluorescence ophthalmology
dermascope described in these Operating Instructions is pro-
750 mA
690 mA
29 mA
2.5 V 440 mA
3.5 V 690 mA
2.5 V 450 mA
3.5 V 640 mA
average service life 15 h
average service life 15 h
average service life 10000 h
mean life span 15h
mean life span 50h
mean life span 15h
mean life span 40h