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Safety Measures
OPMI LUMERA® 700
Version 7.3
Page 20
G-30-1673-en
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 through the patient's pupil. It is also recommended to
make sure that the patient's eye is not additionally exposed to the light of sur-
rounding light sources.
This problem has been solved by Carl Zeiss by the use of a retina protection
device that can be swung into the microscope's illumination beam path and
a swing-in retina protection filter (blue barrier filter).
Brightness adjustment
With increasing age of the light source, the actual illumination intensity deliv-
ered at the respective setting decreases (this is a normal property of the
system).
Phototoxic risk factors
The microscope light source - like any bright light source - may present a po-
tential hazard to the patient's eye both in the form of immediately visible
thermal damage to the retina as well as phototoxic chemical reactions which
may lead to photoretinitis. The factors which play an important role in deter-
mining the phototoxic risk are:
– Lamp brightness
– Spectral distribution of the light (UV and blue light is more dangerous than
longer wavelengths)
– Duration of direct exposure
– Pupil size
– Clarity of ocular media (infants and young children, for example, may be
at a higher risk)
– Condition of the eye: aphakic and pseudo-aphakic eyes with IOLs are at a
higher risk.
– Previous exposure to bright light such as retinal photography, especially
within the last 24 hours
During cataract procedures, factors such as lenticular material, instruments
Summary of Contents for opmi lumera 700
Page 1: ...Carl Zeiss OPMI LUMERA 700 User manual G 30 1673 en Version 7 3 2012 05 02...
Page 4: ...OPMILUMERA 700 Version 7 3 Page 4 G 30 1673 en...
Page 46: ...Safety Measures OPMI LUMERA 700 Version 7 3 Page 46 G 30 1673 en...
Page 61: ...Version 7 3 G 30 1673 en Page 61 OPMI LUMERA 700 System Overview Fig 23 Overhead display 11...
Page 106: ...System Overview OPMI LUMERA 700 Version 7 3 Page 106 G 30 1673 en...
Page 109: ...Version 7 3 G 30 1673 en Page 109 OPMI LUMERA 700 Preparations for use...
Page 113: ...Version 7 3 G 30 1673 en Page 113 OPMI LUMERA 700 Preparations for use Fig 48 OR scene 1 2...