The blurrier the picture is, the more the image you’re looking at has been manipulated for 3D presentation; and Dark Phoenix has a solid degree of blur involved in its conversion.
During a 3D movie, it’s always tempting to remove those glasses to see what’s on the screen.
But in that exercise, the level of blur you observe is an important correlation, and it’s to the degree of 3D imagery that’s being displayed.
We did it as kids, and still do it as adults, to see how blurry the screen gets.