"Ladybug?"
Chat's voice is trembling. He's staring straight at the ground after being sent flying when the akuma's attack hit him. Ladybug can't see his face from where she is, but the way his voice wobbles makes her worried. She flings herself around a lightpole to get to the ground.
"Ladybug?"
His voice is a bit more stable, but he refuses to look up until the click of her shoes hit the pavement beside him. Then, and only then does he lift his head. Striking green eyes meet hers for only a second, no fog covering them for the first time in a year and a half knowing him. And then they snap shut as he grimaces. Instead of taking what meager sight Chat already possessed, it had given him full vision. And it was overwhelming him.
"L.. Ladybug?"
His voice suddenly sounds so small. Chat's hand reaches for her and she slips her own into his willingly. Gently pulls him upright and starts running with him.
As long as his eyes are shut, he's keeping up. He can't resist the urge to open his eyes though, and each time he does, he stumbles. So he brings his other hand up to cover his face and falls perfectly in line with Ladybug's steps. He trusted her to guide him, just like she had every other time.

Her hand lets go of his and Chat lets out a panicked noise, until he hears a light switch and the sound of a heavy door shutting. Somewhere safe? He chews his lip before peaking an eye open, greeted to a dim room. It's easier to stomach and parse than full light out on the streets. Ladybug is pulling the blinds down and he realizes she's trying to make him comfortable. Chat raises his hand to look at it, noting the button on the side of his- his lips purse and he raises his other hand to touch and feel- his cuff. That was his cuff yes. He opens his other eye and grimaces a bit, not knowing Ladybug had turned to watch him. This was his cuff. Why hadn't he been able to tell? Was it because he'd never been able to see so clearly before? There's another button near his elbow. Chat's fingers trace the path his eyes take, to confirm what his mind was trying to tell him. He thinks he'd heard about this before. Moly...Molynox's theory? Something like that. His father had worried it might happen to him if his abysmal vision got better. Blind people who had their sight restored experienced difficulties understanding what they were seeing was the crux of the theory, he's pretty sure. And, Chat decides, it might be true. He looks up at Ladybug, blinking owlishly a few times as he struggles to figure out who- he knows!- he's looking at.
"Ladybug?"
She steps closer slowly, so she doesn't startle him, and lets him reach forward like he usually did to touch her shoulder. Once she'd found out he was blind, she'd let him touch her more, as she realized that it was his way of orienting himself. Sure, sometimes he did it just to flirt, but it was usually accompanied with words when he did. The way his eyes stare just over her shoulder worries her, until he looks at her face and near instantly shuts them again. "I can turn the lamp off, if it's still too much, Chat." She'd left it on for her own sake, but if everything was still too much-
Chat shakes his head and takes a deep breath to steady himself and opens his eyes again. "No- No. It's fine. It's just... A lot. There's a lot. I'm not used to-" a pause as he leans in to look at her mask, counting the dots that he could now see, "- this much detail. I just need a few minutes." He's getting better. Chat wonders if his reaction would be worse if he'd still been as blind as he had been when he was a child. He leans back and slowly lets go of her shoulder to look at his surroundings. "Thanks- I don't think I'd have been able to get away on my own. That was... it was really overwhelming at furrst."
The pun falls flat with how his voice trembles and Ladybug takes his hand, guides him to a chair so he can sit and figure things out. "Like I'd leave you behind, chaton." They have the time to spare for him to do this, and she thought he might appreciate it. "Take your time. I managed to lose the akuma on the way."
Chat Noir sits in the chair and watches Ladybug as she moves around, trying to center himself. To parse the visual information he's getting. Something familiar made it easier to understand and soon enough he sighs deeply. "You can... You can turn the lights on buggaboo. I think I can handle them."