Ambulance 912HAP 9252
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Eye stroke

In an eye stroke, an artery of the retina becomes blocked. Vision in one eye is usually lost partly or completely, suddenly and without pain. This requires immediate medical care: the chance of recovery is limited, and the risk of a stroke must also be investigated the same day.

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In an eye stroke, an artery of the retina becomes blocked. Vision in one eye is usually lost partly or completely, suddenly and without pain. This requires immediate medical care: the chance of recovery is limited, and the risk of a stroke must also be investigated the same day.

  • Sudden, painless loss of vision in one eye.
  • A dark shadow, curtain or large blind spot in the field of vision.
  • Do not wait with sudden loss of vision; have someone arrange transport or emergency help immediately.
  • Do not drive yourself with newly reduced vision.
  • Get in touch urgently the same day for a brief episode of dark or blurred vision in one eye, even if everything recovers.
  • For urgent GP care outside office hours, call HAP 9252. Call Ambulance 912 only for an immediate threat to life.

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Further reading

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Blood vessel blockage in the eyeThrombosis in the eye may refer to blockage of a retinal artery or vein. An arterial blockage often causes sudden painless loss of vision and is considered an eye stroke with an immediate risk of a brain stroke. A vein blockage also requires prompt ophthalmic assessment.
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Giant cell arteritisGiant cell arteritis is inflammation of medium and large arteries, almost always in people aged 50 or over. A new headache, jaw pain when chewing or vision symptoms must be assessed the same day to prevent blindness and stroke.
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Bell's palsyIn Bell's palsy, the facial nerve on one side suddenly works less well. This can make the corner of the mouth droop and prevent the eye from closing. Because a drooping face can also result from a stroke or another condition, assessment the same day is necessary.