What should I do when an eye safety inspection comes?

Czech Republic

Show them the relevant eye safety graph from Ronja Metropolis/Tetrapolis legal issues section or Ronja Inferno legal issues section.
The eye safety has been determined by calculation, which is performed by the Gnuplot program. The formulae used for the calculation are in the Gnuplot source. You can find the source at the same link.
The source is commented so the inspection should be able to check that the calculation is done physically correctly and in accordance to the appropriate regulation.
The calculation is based on worst case power output of the LED from datasheet and lens gains measured on real lens samples using Ronja Benchpress.
Worst case is being taken into an account, where the device is not focused into the receiver far away, but instead misfocused into the observer's eye. For this calculation, shift of 40mm is taken into account. 20mm is distance between middle of the focus path (nominal position) to the front end of the focus path. Another 20mm is allowance for manufacturing errors.
For Ronja Inferno, the limits are exceeded when looking with binoculars from less than 20 meters. This is prevented by the warning label put on the roof door.
For Ronja Interpolis and Tetrapolis, the maximum allowed exposure time drops down to 300ms for stronger binoculars in particular very close distance. However, observing Ronja with binoculars from so close is unpleasant, because the LED image appears as a large very bright red light. The user will instinctively blink and turn away. The nominal blink reflex duration is 250ms. Therefore the observer is protected even in this case.

Switzerland

In Switzerland it seems there is no law that would limit non-laser visible and infrared sources from the eye safety point of view. See also Ronja Metropolis/Tetrapolis legal issues and Ronja Inferno legal issues.