Liquid eyes 

When you’re crying

Why have you got liquid eyes?

Liquid eyes by YoYesLightTheBifta May 15, 2021

eyes like Liquid helium 

NOUN:

Meaning: it means lifeless eyes. Because Liquid helium has no color.
And it can also mean expressionless eyes because the color of liquid helium is lifeless

She stared at me with eyes like Liquid Helium.

eyes like Liquid helium by Robot90 October 12, 2020