It can come on gradually or suddenly, affect all or part of your sight, and be the result of a minor problem or something more serious.
You can also get blurry vision in one eye only.
Most cases are treatable but it’s important to pinpoint the cause.
There are many possible reasons for blurred vision.
A cataract is the gradual clouding of your lens, which is a transparent disc behind your iris (the coloured part of your eye). It’s common in people over 65, though it can happen earlier. Besides blurred vision, symptoms include sensitivity to light and a dulling effect on colours. Luckily, it’s easily treated with cataract surgery.
Over time, diabetes can lead to a condition called retinopathy, when the tiny blood vessels at the back of your eye become blocked and leak. This can lead to sight loss but can be prevented if detected early through regular screening.
There are four types of glaucoma, which can lead to a build-up of pressure in your eye, damaging the optic (seeing) nerve. This can permanently damage your sight, especially your side vision, but once it’s detected, sight loss can usually be prevented.
Age-related macular degeneration (AMD)
The cone cells on the macula (a part of your eye that’s vital for seeing) become damaged, leading to loss of central vision. There are two main types: dry AMD, which progresses slowly but is untreatable, and wet AMD, which progresses more rapidly but is treatable, especially if spotted early.
It’s important to get a diagnosis for blurred vision as soon as possible, especially if it's come on suddenly and/or you have other symptoms. See your optometrist or GP for further investigation.
Go straight to your nearest hospital’s A&E department if you also have:
Treatment depends on the cause. They may include: