Blurry vision is when you don't see as clearly or sharply as you once did. It's the most common vision problem. Blurry vision is different from loss of vision. Loss of vision means you become blind or can't see anything in all or part of an eye.
Most often your vision is blurry and you just need glasses or contact lenses because you are:
Other common causes:
Go to a hospital right away if you have blurry vision and any of these warning signs:
Your blurry vision started suddenly
Severe loss of vision, especially in just one eye, even if the symptoms started slowly
Eye pain (with or without moving your eyes)
Having blind spots—not being able to see a certain area in your field of vision
You have an immune system problem, such as HIV or AIDS
If you have blurry vision and a health problem that can cause eye damage, such as diabetes, high blood pressure, or sickle cell disease, see an eye doctor within a few days—even if you have no warning signs.
If you have blurry vision with no warning signs, you can usually wait a week or longer to see an eye doctor.
Doctors will ask about your symptoms and health history.
Check your vision with an eye chart
Put some liquid drops in your eye (you may have a burning feeling that lasts a few seconds)
Look into your eye using a special magnifying light (the light is very bright)
Measure the pressure in your eye (there are different ways to do this, but none of them hurt)