Who has a severe visual handicap?

You answered correctly. The man in the image is using a white cane, which in Germany is a clear indication of a severe visual handicap (blind or severely visually impaired). This is a widely recognized rule in German traffic, and drivers must be especially careful, giving right of way and being prepared to stop for people with a white cane. The child and the woman do not display any visual aids or signs of visual impairment, so only the man qualifies as having a severe visual handicap in this situation. Always look for the white cane as an important clue in traffic situations.