Zeiss SL 800, Набор документации на продукцию, Страница: 39 / 94

Documentation set 7 Operation
SL 800 7.4 Setting the brightness
000000-2268-355-DokS-GB-300719 39 / 94
7.4 Setting the brightness
Action
u
Set the brightness control on the instrument base to the
desired brightness. In the final position of the control (left) the
illumination is switched off. Turning the control allows
continuous adjustment of brightness. If turned fully to the right
stop, the brightness is set to maximum.
The illuminance on the fundus can be reduced as follows:
u
Decrease the brightness level of the illumination.
u
Do not set the slit width and length larger than necessary.
u
Do not dilate the patient's pupil unless it is really necessary.
7.5 Positioning the patient
Action
u
Position the patient so that his/her chin and forehead are
pressed firmly against the headrest.
u
Adjust the height of the chinrest until the patient's eyes are
approximately level with the canthus marks.
u
Make sure that the patient rests his/her hands in his/her lap.
This also assists in obtaining the correct posture with regard to
the headrest.
7.6 General notes on device operation
Action
u
Choose a slit length and width that only illuminates the eye
segment which is to be examined. Otherwise, sections of high
reflectance (e.g. sclera) may be illuminated, thus causing
disturbing glare.
u
Select the filters with the filter lever according to the type of
examination.
u
For retroillumination, set the angle between observation and
illumination as low as possible. If necessary, loosen the button
for slit centering and slightly decenter the illumination by
swiveling the mirror base.