One eye seems to wander inward, outward, upward, or downward
You close or cover one eye to see more clearly
You have blurry vision in one eye
You have poor depth perception
You tilt or turn your head to see better
You squint often
You have trouble reading or focusing with both eyes
You notice one eye is weaker than the other on vision tests
You have difficulty judging distances
You experience eye strain or headaches when using both eyes
You see double at times
A doctor or eye exam shows reduced vision in one eye that is not fully corrected by glasses