The Eye Clinic5 min read
"Everything's gone blurry" is one of the most common reasons people worry about their eyes. Most causes are harmless and easily fixed — but a sudden change, especially in one eye, is worth taking seriously. Here's how to think about it.
The everyday causes
Most blur builds up slowly and simply means your eyes need a little help. An out-of-date glasses or contact lens prescription, dry or tired eyes, or the gradual clouding of a cataract are all common — and all very treatable, from new lenses to dry-eye care or cataract surgery.
If your vision has drifted gradually over months and is much the same in both eyes, it's usually this kind of everyday cause.
When blur needs a specialist
Some patterns point to something at the back of the eye. Blur or a missing patch in your central vision can be a sign of a macular problem; straight lines looking wavy is another. Blur that comes with new floaters, flashes or a shadow can involve the retina. And people living with diabetes should have blur checked, as it can signal changes in the eye's blood vessels.
These aren't reasons to panic — but they are reasons to be seen rather than to wait and see.
Sudden blur in one eye — don't wait
A sudden loss or blurring of vision in one eye, especially if it's painless, should be treated as urgent. It can occasionally be a sign of a problem with the eye's blood supply — or, if it comes with weakness, numbness or slurred speech, a stroke, which is a medical emergency.
If your vision drops suddenly in one eye, call us on 04 470 7663 — and if there are any stroke-like symptoms, call 111 straight away.