eVO 350
INSTRUCTIONS FOR USE (continued)
13
8126300-795
eVO 350
Issue 1.2
Printed on June,2020
Figure-16 Illumination Angle
Figure-17 Illumination Angle Scale
Filter
Dial
Slit Length Dial
Figure-18 Filters and Slit Length
Slit Rotation
Scale
Figure-19 Slit Rotation Scale
E
Figure-18 a Yellow Filter knob
OPERATION (continued)
11. The slit width can be adjusted by rotating the Slit
Width/Rotation Knob on either side of the instrument.
Refer to Figure-15.
12. The angle between the illumination system and
the microscope can be varied between 0˚and 90˚ to
either the left or right. Refer to figure -16.
13. The illumination angle is indicated on the Illumination
Angle Scale on the slit lamp arm. Refer to figure -17.
14. Magnification is altered by rotating the Magnification
Dial on the Microscope Assembly. Refer to figure -16.
ADJUSTING SLIT LENGTH
The slit length is adjusted by rotating the Slit Length
Dial. The dial has five stops for adjustments. They
are 0.6, 5.8, 9, 13.5 mm diameter and continuous 1.5
to 12.0mm. They index into place. Refer to Figure-18.
FILTERS
The Filter Dial has four positions that index into place,
and are color coded to indicate the active filter. Refer
to Figure-18. The color coded index stops are as follows:
Blue dot = Cobalt Blue
White dot = Open
Red dot = Heat Absorbing
Green dot = Red-free
YELLOW FILTER (WRATTEN FILTER)
Yellow Filter in Slit Lamp is ideal in detecting subtle staining
caused by solution interaction with hydro gel contact
lenses.
The filter can be used for early detection of micro-puncture
corneal staining caused by contact lens/solution interaction,
early detection of the correlation between patient symptoms
and signs of dry eye syndrome, and better visualization
of RGP fluorescein patterns. Refer Figure- 18 a.
SLIT ROTATION
Slit rotation is achieved by grasping the Slit Width/
Rotation Knob and twisting the slit body to the left or
right. The degree of rotation is indicated by the Slit
Rotation Scale above the slit body. Refer to Figure-19.
Magni
fi
cation
Dial
