those keen-eyed geeks

[SamwiseGamgee]

When elves went blind- or at least their eyesight began to fail them- they did not, in fact, get contact lenses. They would buy a weasel, train it to speak and then when training was complete they would hide it in their hair and the weasel would give a vivid and colourful description of all, which was just as good as seeing.