What it is
Vision usually returns to normal after an attack. Because sudden vision loss in one eye can have other, more serious causes, it needs to be checked by a doctor.
Avoiding triggers and medicines used for migraine can help.
Common signs
- Flashing lights, blind spots or loss of vision in one eye
- Vision problems lasting up to an hour
- A headache before, during or after
- Feeling sick
How it is usually diagnosed
- Questions about symptoms
- Eye examination
- Tests to rule out other causes
Records worth keeping
Keeping these together makes each appointment easier, especially when you see a new doctor:
- Eye examination reports
- Neurology or GP letters
- A headache diary
Questions to ask your doctor
- Have other causes of vision loss been ruled out?
- What might be triggering attacks?
- Which medicines are safe for me?
When to get help right away
Call 112 or go to the nearest emergency department if you have:
- Sudden vision loss that does not come back, or vision loss with weakness, numbness or slurred speech: call 112
This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.