Eternals star Lia McHugh says Richard Madden found Ikaris' powers hard to perform:

"Like, Richard [Madden], it was hard for him because lasers are shooting out his eyes. He's literally like [eyes widen]. He can't do anything to show that." https://t.co/R4BPBqhunJ pic.twitter.com/G7O6oH2Bzp

— Screen Rant (@screenrant) January 25, 2022