We saw it right up until the moment Voldemort cast the Killing Curse
You’re misremembering the chapter, that scene ends like this:
And the boy in the crib saw it, the eyes, those two crimson eyes, seeming to glow bright red, to blaze like miniature suns, filling Harry’s whole vision as they locked to his own -
You’re misremembering the chapter, that scene ends like this: