@Balenol
One of the things I like about this episode is that Seto's eyes get to play an important part for Anjou to show attachment towards Seto. For most of the episode, Seto's eyes are being blocked by text bubbles, by the angle of the frame or the eyes just not being drawn. The other characters also don't get any shots of their eyes. By not showing the eyes we are shown that Anjou doesn't have any attachment or interest towards Seto or the other characters. Only when Seto responds to the metaphor do we get to see Seto's eyes for the first time in a panel and that reveal also shows us when Anjou finally "sees" Seto.
In manga, really all media, its a common trope for someone to say something significant and get some face reaction panels and that happens a lot in this manga as well because it's effective. This iteration is one of the better ones because the earlier panels also play a role in emphasizing the eventual eyes reveal. When an author or artist can use multiple tools to emphasize a single point, it will be more effective and significant for the audience.