Common signs of a vision problem include: 

Blurred vision, or vision worse at end of the day

Double Vision

Headaches, dizziness, nausea with reading

Tripping, misjudging distances, tendency to knock things over

Difficulty driving at night / in wet weather

Visual disturbances, such as flashes of light or shadows in vision

Eye irritation, strain or discomfort

Common vision problems include: 

Presbyopia

Hyperopia (Long-sightedness)

Myopia (Short-sightedness)

Astigmatism

Computer Vision Syndrome

Convergence Problems 

Amblyopia (Lazy Eye)

Colour Vision Deficiency