Zeiss OPMI Lumera i Instructions For Use Manual

Safety measures OPMI Lumera iVersion 8.0Page 16 G-30-1720-enMeasures to prevent phototoxic injurySeveral papers1)-5) dealing with the problem of phototoxicity in ophthalmicsurgery have been published. A comprehensive review of these publicationsreveals five aspects of particular concern:– Illumination characteristics (spectral composition)– Illumination intensity– Angle of illumination– Focus of the light source– Exposure time to lightIn the following, comments on these aspects are given and a description ofhow ZEISS, as a manufacturer, makes allowance for them in its systems.Illumination characteristics (spectral composition)Studies on exposing the eye to light with varying spectral compositions havebeen conducted since as early as the 1950s. These studies suggest that thepotential hazard of phototoxic injury to the patient’s retina can be reduced byblocking out the blue and ultraviolet light below a wavelength of 475 nm.Integrated protection filters For protection of the retina, ZEISS offers the swing-in retina protection filter(blue barrier filter) and the stationary UV blocking filter as standard featuresof the surgical microscope. This reduces not only the exposure of the patient’seye to light, but also that of the surgeon.An important point to note here, however, is that the use of filters willinevitably change the perceived color of the light. For this reason, the surgeonmay initially have to get used to the changed appearance of the anatomicalstructures.