There are many reasons why you might suddenly experience blurred vision, and they range from serious causes such as stroke, to less threatening reasons such as dry eye, a migraine or a change in your prescription. If your blurred vision is associated with other symptoms including numbness in the face or body, dizziness, or difficulty speaking, visit your medical doctor or emergency room right away.
Even if your vision clears up again, it is important to have a full eye health exam by your doctor of optometry. You may require eye drops, or corrective lenses. If you have been previously diagnosed with an eye condition, sudden blurred vision could indicate progression that may require treatment.