daytime naps were always a nightmare for us. At 10m, she has a nap after about 3 hours after waking. Then she will probably want to sleep another three hours after that. In bed by about 7pm, and sleeps through. So if she wakes at 6.30 - 7am it's a pretty good day which works out fine. It doesn't happen often, but if we have a strange morning, where she wakes late, between 7.30 and 8 - this affects the sleep pattern, and she just won't go to sleep at 11. Then she's tired and irratable, doesn't eat much lunch and then wants to sleep at 12:30 / 1pm and it kinda screws the day up. Hateful, but I think the idea of waking them so they don't sleep in too long in the morning, actually makes for a better day.
Don't let her nap after 3pm, cause then it's more difficult to put her down in the evening.
Weirdly - this is not based GF, but I read it recently, and it's kind of fallen into a similar routine she "advises"... (NO - I'm not advocating ... No flaming )
I have read eyes can change colour anywhere up to 6 years after birth.