Blurry vision: causes, symptoms, treatment

Blurry vision overview

Blurry vision is when objects appear out of focus, hazy, or unclear. This common symptom can affect one or both eyes and may come on gradually or suddenly. While blurry vision can sometimes be temporary, it can also indicate an underlying eye condition that requires professional attention.

1 of 4
Cornea
The clear, dome‑shaped front surface of your eye that provides most of your eye's focusing power. When the cornea has an irregular shape, as with astigmatism, it can cause blurry vision by preventing light from focusing properly on the retina.
2 of 4
Lens
Located behind the iris, this flexible structure changes shape to help focus light at different distances. As we age, the lens becomes less flexible (presbyopia) and may develop cloudy areas (cataracts), both of which can cause blurred vision.
3 of 4
Retina
The light‑sensitive tissue at the back of your eye that converts light into electrical signals sent to your brain. Problems with the retina, such as diabetic retinopathy, can cause various types of vision problems including blurriness.
4 of 4
Pupil
The opening in the center of the iris that controls how much light enters your eye. In certain lighting conditions or with some medications, pupil size changes can affect how clearly you see.

What is blurry vision?

Blurry vision is when your eyesight lacks sharpness, making objects appear out of focus, foggy, or hazy. You might describe it as looking through a dirty window, seeing everything through a soft filter, or feeling like there are waves in front of your eyes. This visual disturbance can affect your ability to see fine details, read text clearly, or recognise faces at a distance. Blurry vision can occur in one eye or both eyes, and may be constant or come and go throughout the day.

The condition can range from mild blurriness that's barely noticeable to severe vision impairment that significantly impacts daily activities. Some people experience blurry vision causes that are temporary, such as at the end of the workday, while others may have persistent issues that require corrective lenses or medical treatment.

Let’s get your vision sorted

Noticed your eyes hurting, or a change in your sight? Whether it’s something new or something that’s been bothering you for a while, we’re here to help.

Book an eye test

Blurry vision vs. Other vision problems

It's important to distinguish blurry vision from other visual disturbances:
Unlike cloudy vision, which appears as if you're looking through a frosted window, blurry vision typically maintains colour perception but lacks sharpness.
Double vision creates two images of the same object, while blurry vision shows one unclear image.
Floaters appear as spots or threads drifting across your vision, whereas blurry vision affects the overall clarity of everything you see.

What causes blurry vision?

Blurry vision is a common symptom and can happen for many reasons. From refractive conditions that you might need a prescription for, to conditions like cataract or dry eye, to too much screen time and note enough sleep, blurry vision causes are wide‑ranging and varied.

Blurry vision can often signal conditions like presbyopia or astigmatism, which can be diagnosed with an eye test and helped with a prescription for glasses or contact lenses.

However, it might be signalling a something more concerning that's important to get checked out properly by an optometrist.

Book an eye test

How does blurry vision affect your eyesight?

Blurry vision can present in many different ways:

Constant vs. intermittent

Constant blur suggests long or short‑sightedness, astigmatism or cataracts. Intermittent could be due to temporary or environmental factors such as dry eyes, migraines or blood sugar fluctuations.

One eye vs. both eyes

It is common to have refractive error in either one or both eyes. Other reasons for blur in both eyes can be from systemic issues or various health conditions. Blur in one eye only may indicate a local problem within that eye like a cataract, retinal or optic nerve issue.

Distance‑dependent blurring

If things look blurry in the distance, it’s often down to short‑sightedness (myopia). If things are blurry up close, it could be a sign of long‑sightedness (hyperopia). If your vision’s blurry at all distances, it might be caused by astigmatism, cataracts or another eye health related issue.

When should I get my eyes tested?

You should book in if you’re starting to notice blurry vision that’s slowly getting worse, or if you’re finding it harder to see clearly when driving, reading or watching TV. It’s also important to get checked immediately if your blurry vision comes with flashing lights, headaches or eye pain. If things go blurry after time on a screen, that’s another sign it’s time for an eye test.

Worried about the cost of your eye test?

While routine eye exams aren’t covered by the public health system, some people may qualify for financial help through WINZ (Work and Income), especially if you’re on a low income or have a Community Services Card. You can use this support at Specsavers‑ no hospital visit or GP referral needed.

Children under 16 may also be eligible for free eye exams and glasses through the Children’s Spectacle Subsidy.

Let’s get your vision sorted

Noticed your eyes hurting, or a change in your sight? Whether it’s something new or something that’s been bothering you for a while, we’re here to help.

Book an eye test

Who's more at risk?

Certain factors increase your risk of developing blurry vision. People with diabetes are at higher risk of diabetic retinopathy, which can cause blurred vision due to blood sugar changes temporarily affecting their eyes.

Those who spend long hours looking at screens may experience digital eye strain, leading to temporary blurriness. Family history of eye conditions, like myopia, high blood pressure, and certain medications can also increase your risk.

What happens during an eye test for blurry vision?

Your optometrist will check your eyes thoroughly to find out what’s causing the problem. They might ask about your symptoms and health history, test how clearly you can see at different distances, and check your prescription. They’ll also look at the front and back of your eyes, test your eye movements and pressure, and make sure everything’s working as it should. You’ll get a clear diagnosis, advice on treatment, and a prescription or referral if needed.

Book an eye test

Health related causes of blurry vision

There are lots of different conditions that can cause blurry vision, but these are some of the most common.

Myopia

Short‑sightedness (myopia) means distant objects appear blurry, especially in children and young adults. It can lead to eye strain and worsening eyesight if you don't get it treated.
Learn more about myopia.

Presbyopia

Presbyopia is an age‑related condition that makes it harder to focus on close objects. It usually becomes noticeable in your 40s.
Learn more about presbyopia

Hyperopia

Hyperopia (long‑sightedness) can make close work blurry or tiring. It happens when the eye is slightly too short, and can lead to eye strain or headaches, especially with reading or screen use.
Learn more about hyperopia (long sightedness)

Astigmatism

Astigmatism is a common focusing issue caused by an irregularly shaped cornea or lens. It can make vision look blurred or distorted at any distance.
Learn more about astigmatism

Diabetes

Diabetic retinopathy damages the tiny blood vessels in the back of the eye, causing them to leak or become blocked. When blood flow is reduced, the eye may grow new fragile vessels that can bleed easily and lead to more serious vision problems. Patients with diabetes may also experience blurry vision due to blood sugar changes temporarily affecting their eyes.
Learn more about diabetic retinopathy

Cataracts

Cataracts cause the eye's lens to become cloudy over time, often as a result of ageing. This leads to blurry, hazy or dim vision.
Learn more about cataracts

Dry eyes

Dry eyes happen when your eyes don’t make enough good‑quality tears. This can cause blurry vision, irritation, or redness.
Learn more about dry eye syndrome

Macular degeneration

This age‑related eye disease impacts the central part of your vision, making tasks like reading and face recognition more difficult.
Learn more about macular degeneration

Why is it important to test for blurry vision?

If you’re experiencing blurry vision, it’s important to book an eye test to get to the bottom of what’s causing it. In many cases, it could be something straightforward like needing glasses or an updated prescription. But blurry vision can also be an early sign of an eye condition such as glaucoma, cataracts or macular degeneration. These conditions are easier to manage when caught early, so regular eye checks can make a real difference.

An eye test doesn’t just check your eyesight. It can also reveal signs of wider health issues like diabetes or high blood pressure. Spotting these early can help you take action sooner and protect your vision from long‑term damage.