"For Radioactive, strangely, they made my eyes brown," she said. "I still don't quite know why. A browny, crazy colour."
She told The Kelly Clarkson Show: "Then I was thinking about it. Those are the obvious times, right? When you do notice, 'Oh, I've got brown eyes,' or, 'I've got massive breasts.'
"But there's probably countless times where our image is doctored and we don't notice it, because I think we are all losing our grip on what we really look like."
Pike said she did not realise that people altered images for selfies until she was approached by a stranger. "I was on a flight with this guy, someone I didn't know, and I took a selfie," she recalled.
"He looked over my shoulder and he said, 'No, no, you have got to Facetune that.' And I said, 'Sorry, what?' That was my introduction to Facetuning, which has often happened ... and body tuning."
Pike was promoting her new drama, I Care A Lot, which is streaming on Amazon Prime Video in New Zealand.