Blurry Vision
Also known as Blurred Vision, Fuzzy Vision, Cloudy Vision, Trouble Focusing, Vision Changes
Bottom Line
Blurry vision means your eyes or brain are not making a sharp picture. Many causes are minor, but sudden blur, pain, weakness, or vision loss needs urgent care.
Blurry vision is a symptom, not a diagnosis. It can come from glasses prescription changes, dry eye, cataract, migraine aura, diabetes, retina disease, optic nerve disease, stroke, or medicine side effects.
Doctors first separate mild blur from acute vision loss. Sudden vision loss, a new curtain or shadow, one-sided weakness, trouble speaking, or severe eye pain is treated as urgent because the cause can be retinal detachment, stroke, acute glaucoma, or optic nerve inflammation 1.
Blur that comes and goes with screen use, dryness, or near work is often less dangerous, but it still deserves an eye exam if it keeps happening. Computer vision syndrome is a common cause of tired, blurry eyes during long screen sessions 2.
Common Causes
Common causes include a glasses prescription change, dry eye, cataract, computer vision syndrome, migraine aura, high blood sugar, and contact lens problems. Computer vision syndrome can cause eyestrain, dryness, and blur during long screen sessions 2.
- Gradual distance blur often means nearsightedness, farsightedness, or astigmatism.
- Near blur after age 40 is usually presbyopia.
- Cloudy glare can be cataract.
- Fluctuating blur often comes from dry eye or tear-film problems.
Red Flags That Cannot Wait
Urgent red flags include sudden vision loss, a curtain or shadow, many new floaters and flashes, severe eye pain with halos and nausea, new neurologic symptoms, eye injury, chemical splash, or new pain/vision drop after eye surgery. Sudden vision loss has a wide differential and needs fast triage 3.
What To Do Before Your Visit
Write down when the blur started, whether it is one eye or both, and whether covering either eye changes it. Bring all glasses, contact lenses, eye drops, and medicines. If you have diabetes, bring recent blood sugar or A1C numbers.
Common Questions About Blurry Vision
Next Steps
- 1Go to the emergency room or call 911 for sudden vision loss, stroke symptoms, severe eye pain with halos/nausea, or a curtain/shadow.
- 2Call your eye surgeon the same day for new blur, pain, redness, or floaters after eye surgery or an injection.
- 3Book a full eye exam for blur that lasts, keeps returning, or affects reading, driving, school, or work.
- 4Bring your glasses, contacts, drops, medicine list, and diabetes numbers if you have them.
Find specialists for Blurry Vision
Board-certified ophthalmologists who treat Blurry Vision.
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