
Originally Posted by
ravenmoon
no, not headcanon, but putting two and two together from the canon lore we have. WotA tells us they are connected to the WEll, Chronicles revealed how and why, because they are made and modified by it directly although it doesn't show us how. WotA the Sundering tells us that when the 2nd well was reformed they could feel it inside.
Warcraft website articles on eye glows that tells us they glow is because of the inner power from their connection to the WEll of eternity - which I deduce to me a link to Azeroth'z arcane blood, since the glow was never lost when the first well imploded.
Several places in lore it is remarked the blood elves hold the night elves, in particular the Darnassiasn in contempt because of the power they have had and wasted by not ustilising, this refers to the Well and Moonwell and the inner power they've being squandering out of "cowardice", "superstition" and baseless "fear" - as they put it.
Meanwhile the High elves devolved, the connection and inner arcane power lost, this to me implies there were no glowing eyes as they lost immortality, lost height, lost stature, lost intelligence and became much weaker versions of their former selves. Until they found Quel'thalas and established the sunwell, they keep themselves constantly suffused with its power, they aren't made from the sunwell, and their natural connection to the WEll of Eternity is severed (this is lore), so what they have is a man made or rather elf made artificial connection (this is the deduction I make). I imagine this to mean that these elves in a weakened state require this enhancement more than ever, but it's not on the same level as the Well of Eternity, but thye make very good use of it. When the power source is destroyed by Kael'thas (lore), I deduce gone is the eye glow, for there is no arcane power charging them up, and they have no natural inner one biologically. It's dangerous for them when their well is polluted because of how connected they are to it, meanwhile when a moonwell is polluted or the Well of Eternity imploded the night elves don't lose that connection though they notice the loss keenly (this is lore in War of the ancients and in quests), because the connection is the aracne blood of the titan (the source of the Well, not the physical pooling in a location like Zin'Azshari or Hyjal).