Patient resources
When to seek urgent eye care
A sudden change in vision or severe eye pain should not wait for a routine appointment.

Get emergency help now
- Sudden loss of vision in one or both eyes, or sudden severe eye pain.
- A chemical splash, a penetrating injury, or an object hitting the eye at high speed.
- A red eye with reduced vision, marked light sensitivity, or a severe headache with nausea.
Arrange an urgent eye examination
- New flashes or floaters, a sudden increase in floaters, or a dark curtain or shadow across your vision. Seek help promptly, even if it does not hurt.
- A painful red eye, especially if you wear contact lenses. Stop wearing the lenses and seek urgent advice.
Getting help
Use your local emergency department or urgent eye service. Do not drive if your vision is affected. If unsure, seek medical advice; this list does not cover every warning symptom.
General information. Follow your clinician’s individual advice.
Sources and further reading
Sources checked: 4 October 2026