30
Safety
G-30-1529-en
OPMI® VISU 160 on S8, S81 & S88 Suspension Systems
Issue 5.0
Printed on 09. 10. 2006
In conclusion
Carl Zeiss recommends:
–
Use of the GG 475 retina protection filter.
–
Reduction of the illumination of the surgical area to the extent required
for the patient's safety and for clear microscopic visualization.
–
Tilting of the microscope body as required.
–
Use of the retina protection device.
–
Maximum reduction of the exposure of the patient's eye to light from
surrounding light sources.
These measures should help the surgeon to reduce the risk of phototoxic
retinal injury in the patient.
Note:
The illumination system of the VISU 160 surgical microscope always con-
tains a UV blocking filter.
The use of this filter ensures that the illumination intensity lies below 50
µW/cm
2
in the range between 305 nm and 400 nm.
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).
4)
G. Kleinmann, P. Hoffman, E. Schechtman, and A. Pollack, "Micro-
scope-induced retinal phototoxicity in cataract surgery of short duration,"
Ophthalmology 109, 334-338 (2002).
5)
ISO 10936-2:2001. Optics and optical instruments -- Operation micro-
scopes -- Part 2: Light hazard from operation microscopes used in ocular
surgery.