I feel like on one hand Ryland would fake like he can't see/hear everything that's going on, its just so awkward.
But on the other it would be so funny if he was like, maybe its early into his arrival so he's doing better but he's still kinda brain fried from all the malnutritions
And so the Eridians are arguing about something infront of the clear-xenonite wall of his medical inclosure/room, and he's lost all since of shame and social etiquette, the brain fog is strong with this one. He's just trying to practice his Eridian by following along to a Level 10 Fast-Passed Angry Eridian Conversation, hes processing words, not context.
But he's like standing AT the floor to ceiling window, just watching them in the dim light shining through from his room, cause they're blind right, they can't see him, and clearly they can't or they'd like, move right???
And it takes the Eridians probably an embarassed amount of time to realize, no the Human isn't just standing by the wall coincidentally, its "front" is towards them, its "head" is tilted down so its light-receptors are directly trained on them.
Its definitely watching them through the wall some how. It has been for a while.
And there's just this moment where they go quit and still like "when he looks at me, and I look at him, and he looks at me, and look at hiiiim"
And then Ryland remembers "Wait, fudge, the CAN see me they're just my kind of blind!!"
And then they're all scrambling away from the glass wall like cats from a cucumbers.
Bonus if Adrian was one of those Eridians. They and Grace vow to never tell Rocky. Rocky finds out anyway, and the day they're giving Grace a tour of his new house, Rocky taps at one of the windows like,
*tap tap* "Adrian Grace see-and-hear, yes, this is clear-Xenonite, is see-through-hear-through, no privacy, very important to remember."