Hen with closed eyes

[Spiderduck]

A few weeks ago i noticed my silkie hen closed her eyes. Didnt open them.
This happens mainly in the morning and she can open her eyes by herself eventually.

She is not displaying any signs of illness.

Her eyes are not swollen or red. She acts fine when i clean up her eyes afterwards.

What do you think it is?

 

[Wyorp Rock]

This happens mainly in the morning and she can open her eyes by herself eventually....She acts fine when i clean up her eyes afterwards.

Are you having to clean the eyes because they are stuck together? Do they have a discharge?

 

[Spiderduck]

@Wyorp Rock

No there is no discharge at all
Nothing in the eyes like froth or liquid.

I dont have the clean her eyes out. I just do it to help. I think she can open them herself if i leave her. I just use warm water and a tissue to clean it.

No idea whats wrong with her

 

[Eggcessive]

You may want to make sure the ventilation in the coop is good, with ammonia odor from droppings, and dusty conditions kept to a minimum since both are eye irritants. If she acts lethargic as well, she might be sick. Then you would check droppings, how much she is eating, feel her crop for impaction, check for a stuck egg, etc. Are both eyes closed when this occurs, or just one?