Zeiss opmi lumera 700, Инструкция по эксплуатации

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Instructions for Use 2 Safety notes
OPMI LUMERA 700 2.7 Measures to prevent phototoxic injury
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Brightness control
ZEISS has addressed this aspect by providing its devices with a
feature for continuously varying the brightness of the light source.
This permits the surgeon to optimally adapt the light intensity on
the patient's eye to the conditions existing in each case.
2.7.3 Angle of illumination
A number of publications [
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1-4)
suggest tilting the microscope
to reduce the exposure of the macula to direct illumination.
Tilting mechanism
The surgical microscope features a tilting mechanism for the main
microscope to enable indirect illumination.
2.7.4 Focus of the light source
Studies show that injuries are likely to occur if the filament of the
light source is imaged on the patient's retina. The peak intensity of
a filament is considerably higher than that of an even and extended
light source.
Fiber optic illumination
For this reason, ZEISS uses fiber optic illumination in its surgical
microscope systems.
2.7.5 Exposure time to light
According to some publications, the eye should not be exposed to
the light source longer than a few minutes. In all surgical cases, the
retinal exposure time to light depends on the type and duration of
the procedure and possible case complications.
It is therefore recommended in ophthalmic surgery to keep the
light intensity as low as possible, or to use a device which prevents
the light from entering the patient's pupil. It is also recommended
to make sure that the patient's eye is not additionally exposed to
the light of surrounding light sources.
This problem has been solved by ZEISS through the use of a swing-
in retina protection filter (blue barrier filter) that can be swung into
the microscope's illumination beam path.
Brightness setting
The brightness control scale of our devices has a linear structure
with values ranging from 2% to 100% for LED light sources and
5% to 100% for xenon/halogen light sources. The stipulations of
standard DIN EN ISO 15004-2:2007 result in maximum radiation
exposure times for the different illumination configurations. These
can be found in the table "Maximum radiation exposure times
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