Technical data

G-30-1682-en OPMI® Lumera® T Issue 4.0
Printed on 02. 02. 2009
Safety 29
Maximum radiation exposure times
The use of the blue barrier filter (retina protection filter) increases the rec-
ommended exposure time by a factor of 3 compared with the values spec-
ified below.
Red reflex illumination (stereo coaxial illumination)
Surrounding field illumination
Note:
The illumination system of the surgical microscope contains a UV
blocking filter as a standard feature.
This helps the surgeon to reduce the risk of phototoxic retinal injury in the
patient.
List of references
1)
H. Stiller, and B. Rassow, "Light hazards to the patient's retina from
ophthalmic instruments," Applied Optics-OT 30, 2187-2196 (1991).
2)
American Conference of Governmental Industrial Hygienists, "Docu-
mentation of the Threshold Limit Values for physical agents. 7th Edition,"
(American Conference of Governmental Industrial Hygienists, Cincinnati,
2001).
3)
S. G. Khwarg, F. A. Linstone, S. A. Daniels, S. J. Isenberg, T. A.
Hanscom, M. Geoghegan, and B. R. Straatsma, "Incidence, risk factors,
and morphology in operating microscope light retinopathy," Am. J. Oph-
thalmol. 103, 255-263 (1987).
Scale display
of Illumination
Max. exposure time in minutes
Halogen Xenon Xenon with
HaMode filter
2.5 50 8.2 28
5 21 4.2 16.5
7.5 13 2.9 10.3
10 9 2.2 8.5
Scale display
of Illumination
Max. exposure time in minutes
Halogen Xenon Xenon with
HaMode filter
2.58.72.58.9
53.71.35.2
7.52.20.93.3
10 1.6 0.7 2.7