Ear infection sorted thanks, BD! Wee man running round like a lunatic so obviously OK.
I'm after hard facts on the effects and the likelihood of significant impairment to vision, and also successful countermeasures (inevitably involving a knock on a door sometime later).
There seem to be two schools of thought; (1) don't worry, it isn't really a problem or (2) this could be catastrophic.
It's another of these things that help me stay awake at night
