[Engel]

Might be like having a sleep in her eye. Get some lukewarm water and a cotton pad and gently wipe over the area.

Here's a few questions (sorry there's a few)
Is she eating, drinking and toileting ok?
Is she still active or is she sleeping a lot more?
Do you know how old she is roughly?
Does she allow you to touch her face?
If you gently move the eye lids is there any redness?
Is this something new, or something she's always had while you've has her?
What bedding are you using?

My hamster has a squinty eye and no one knows why. Nothing irritating it. Not red, inflamed or sore in anyway. She can see out of it. Something she's always had while she was in rescue. Sometimes it becomes sticky so warm water and a cotton pad is used to help with that. Sometimes she has eye drops to help too. She just looks like she's constantly grumpy.