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What to do if…
you develop sudden double vision or have trouble focusing your eyes

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy USA guide

Short answer

If you develop sudden new double vision, call 911 now, even if it improves. If your eyes suddenly will not focus but you are not seeing double, get emergency medical care now; call 911 if this followed a head injury, you have any warning sign below, or you cannot travel safely.

Do not do these things

  • Do not drive yourself.
  • If you have sudden double vision, do not have someone drive you instead of calling 911.
  • Do not wait to see whether sudden double vision passes.
  • Do not climb stairs, bike, use machinery, or cook on high heat while your vision is doubled or you feel unsteady.
  • Do not take extra doses of medication or use alcohol or recreational drugs to try to make the symptoms settle.
  • Do not delay calling 911 because the symptoms improve or come and go.

What to do now

  1. Sit down somewhere safe. Keep your phone within reach and avoid walking without support.
  2. Call 911 now for sudden new double vision. Tell the dispatcher when it started and whether it has improved, returned, or worsened.
  3. Tell the dispatcher immediately if you also notice any of these:
    • sudden weakness or numbness, especially on one side
    • facial droop
    • trouble speaking, understanding speech, or staying oriented
    • sudden dizziness, trouble walking, or loss of balance
    • a sudden severe headache
    • a fall, crash, bump, blow, or jolt to the head
    • one pupil suddenly larger than the other
    • a new droopy eyelid
    • eye pain
  4. If the problem is sudden focusing difficulty without double vision, get emergency medical care now. Do not drive yourself. Call 911 if symptoms are severe, accompanied by any warning sign above, or you cannot travel safely.
  5. Reduce immediate risk while help is being arranged. Stay seated when possible. If doubled images make it difficult to use your phone or see safely while seated, briefly cover one eye if that helps. Do not walk around or delay emergency care to test this.
  6. Have a few details ready for clinicians.
    • the time symptoms first appeared, or the last time your vision felt normal
    • whether the problem is constant or comes and goes
    • whether the doubled image changes when either eye is covered
    • any eye pain, headache, recent injury, medication changes, or blood thinner use

What can wait

  • You do not need to work out the cause.
  • You do not need to try eye exercises, new drops, or supplements.
  • You do not need to decide which specialist you may need later.

Important reassurance

Sudden double vision can feel frightening. Calling 911 is a reasonable first step because some causes need rapid assessment, and you do not need to identify the cause yourself.

Scope note

These are first steps only. Diagnosis, treatment, and later decisions may need an in-person medical assessment and specialist help.

Important note

This is general information, not medical advice or a diagnosis. Follow instructions from emergency dispatchers and healthcare professionals.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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