Don't need to. I'm good at eyeballing. Might not be able to see many colors but my visions perfect.

[He says as if Gokudera knew at all this time that Wriothesley couldn't see all the colors and just gets ready to pierce the first lobe. It goes in clean and quick and he's quick to get a bit of tissue to press on the new wound to stop any possible bleeding.]

How was that 'Dera?