Table 3

Indication of thermal retinal damage with a 300 μm fibre diameter and a 20° acceptance angle, according to the ICNIRP guidelines. Sources of various brands (brand 1–4) were measured with filters that were provided by the manufacturer (filter A–E) or without filter (no filter)

Distance (mm)0000
Time (s)1.01.01.01.0
Light source without filters with GG475 with OG450 With OG435
Metal halide, brand 1, no filterYesYesYesYes
Metal halide, brand 1, filter AYesYesYesYes
Metal halide, brand 1, filter BYesYesYesYes
Metal halide, brand 2, no filterYesYesYesYes
Metal halide, brand 2, filter CYesNoNoYes
Halogen, brand 3, no filterNoNoNoNo
Halogen, brand 4, no filterYesNoNoYes
Xenon, brand 2, filter CYesYesYesYes
Xenon, brand 2, filter DYesNoYesYes
Xenon, brand 2, filter EYesYesYesYes