So, I wanted to see what Serana looked like cured, but just in case, I made a save before sending her off to Falion. When she came back, cured (she has green eyes, more flush lips, and bit darker, redder skin), I made another save. Then, I reloaded my save from before I sent her off, and she still look cured!

I experimented more and loaded a previous save where she still had vampiric features, then reloaded the save again. Her features were now of a normal vampire again. So, now I can switch Serana from cured features to vampiric features as I please, while still maintaining the option to be turned if I ever want to.

Thought this might be useful for those of you who wanted to cure Serana but not lose the abliity to become a Vampire Lord.

I read of something similar working with changing your appearance. Something about when you cure vampirism, change hair or something, than load a save while still a vampire your hair will actually change.
Not sure if it's that simple or not, but an interesting find nonetheless. Whoever posted what I just wrote and what you found.

How do you cure her?

If you do the Dawnguard side, you can cure her at the end as long as you never ask about being cured before the main quest is over.

She looks better as a Vampire and even tells you she loves being a Vampire, I will never cure her.

After cured she says how she feels so free and better than she did as a vampire.

Even then, I'm never going to cure her. I hate her Human Eyes. Makes me think she's got Malaria or something.

lol agreed

Are there any pictures of her cured I would really like to see them?

Can someone post a pic of her

this im afraid i might get a glitch where she wont turn back again after reloading the previous save

Her iris color is a blueish green. But, the white part is yellow. No me gusta.

yes i want a picture as well, i do not trust this game

Yeah, don't. Her eyes go from sixy red to irradiated yellow.