Sudden loss or reduction of vision
A sudden loss or clear reduction of vision in one or both eyes.
EYE HEALTH TOOLS
When should an eye symptom be assessed urgently?
Some changes in vision or eye pain need prompt medical assessment. Use this page as a safety guide, not a diagnosis.
New flashes or many new floaters
Especially when they start suddenly or increase quickly.
A dark curtain, shadow or missing part of vision
This can be associated with a retinal problem and needs prompt assessment.
Severe eye pain or a painful red eye
Especially with blurred vision, headache, nausea, vomiting or light sensitivity.
Sudden double vision
Especially when accompanied by neurological symptoms such as weakness or difficulty speaking or walking.
Chemical exposure or significant eye injury
Immediately rinse a chemical exposure with lukewarm running water for at least 10 minutes and seek urgent advice for hazardous substances or ongoing symptoms.
What should I do?
If you have one of these sudden or severe symptoms, do not use the Vision Check first. Contact your GP or out-of-hours GP service immediately.
This page cannot tell whether you have a specific disease and does not replace an eye examination.