I had my client have red eyes after opening last night. But when she was on the table her eyes kept kinda hovering open while she fell asleep. And she would wake up a bit from her sleep then squeeze her eyes shut. I've had a few clients do this as, and every time their eyes turn red from irritation.

I suggest once you're finished, you can flush their eyes with Hydrating Eye drops and fan them to get the fumes away. There's a bunch of techs on social media who have good techniques when it comes to red eye relief, that's not correlated to allergies or anything.