The significance of Harry having Lily's eyes

[hermionegallo]

No: HPFGUIDX 138776

> Mimbeltonia:
> 
> The _reason_ why Harry has Lily's eyes is not and was never a 
> mystery - it is simply because he is her son.
> 
> The _significance_ (to the plot!) of his eyes looking exactly like 
> his mother's  is the effect looking into Harry's (Lily's) imploring 
> eyes has on Slughorn, whose favourite student she once were: He can 
> not resist, and Harry receives the vital information, the horcrux 
> memory.

hg:
I agree and I'll add (and get laughed off the board for it) that I 
think Slughorn is Lily's grandfather.  His eyes are green.  

There's nothing that says that her parents 100% without a doubt were 
her blood parents, or that one or both weren't squibs.  Or that one 
of her parents wasn't a child of a squib.

If this were the case, plotwise, Slughorn would have much more at 
stake regarding Harry, and would go to more lengths to help him or 
protect him.

For what it's worth...
hg.