Screw your eyes up
Definition 1 of 2
Pro Tip 1/3Visual Effort
Used when trying hard to see something that's not clear. 
I screwed my eyes up to read the fine print.
Pro Tip 2/3Bright Light
Reflects a natural reaction to reduce glare from strong light. 
He screwed his eyes up walking into the sunlight.
Pro Tip 3/3Strong Dislike
Indicates a visual response to something unpleasant. 
She screwed her eyes up at the messy room.