Fig. 13From: Vitreoretinal instruments: vitrectomy cutters, endoillumination and wide-angle viewing systemsSafety calculations for different commercially available light sources, expressed in lumens hazard/watt (personal data). The higher the lumens necessary to create a watt of hazard, the safer the light source (for comparison, brightness, working distance and cone of illumination were all kept constant between the platforms)Back to article page