Blurred vision

blurred vision, unfocused vision, blurred sight, cloudy vision, cloudy sight, poor vision, reduced vision, reduced sharpness, hazy vision, unclear vision, less sharp vision, clouded vision, vague vision, vague sight

Blurred vision is a common visual complaint where you can no longer see clearly and images appear unclear, cloudy or blurred. It can have various causes, ranging from a refractive error to eye conditions or temporary irritation.

Eye conditions

What is blurred vision?

Blurred vision means that you do not perceive images as clear and sharp. Objects may appear unclear, cloudy or blurred, as if there were a haze in front of your eyes. This symptom can occur at all distances, or only when looking at things close up or far away.

There are many possible causes of blurred vision. The most common are refractive errors such as short-sightedness, long-sightedness or astigmatism, where the eye does not focus light properly onto the retina. Other causes may include: dry eyes, tiredness, dirty or damaged contact lenses, eye conditions such as cataracts or glaucoma, or temporary irritation caused, for example, by an allergy or a foreign object.

Certain medicines, fluctuations in blood sugar levels or neurological conditions can also cause blurred vision. If you experience sudden or unilateral blurred vision, or if it is accompanied by pain, flashes of light, spots in your field of vision or other warning signs, it is important to contact your optician immediately.

Good to know

When is blurred vision temporary and harmless?

Sometimes blurred vision is short-lived and nothing to worry about. Examples include tiredness after prolonged screen use, dry eyes caused by air conditioning or low humidity, or irritation from dust or smoke. Rubbing your eyes or suffering from hay fever can also cause temporary blurred vision. In such cases, your vision usually clears up again quickly.

When should you have blurred vision checked?

If you suffer from blurred vision for a prolonged period or on a regular basis, or if it occurs suddenly for no apparent reason, have it assessed by your optician, optometrist or ophthalmologist. They can examine your eyes and measure your visual acuity to determine whether you have a refractive error, an eye condition or another cause that requires attention.

In the event of warning signs such as sudden blurred vision in one eye, flashes of light, floating spots, pain, redness or loss of peripheral vision, urgent consultation with an ophthalmologist is essential.

Blurred vision and contact lenses

If you wear contact lenses and your vision is blurred, this may be due to dirty, damaged or poorly fitting lenses, or to dry eyes. Check that your lenses are clean and that you are looking after them according to the instructions. Stick to the replacement schedule and do not wear your lenses for longer than recommended. If your vision remains blurred, contact your optician or contact lens specialist for a check-up and any necessary adjustments.

Frequently asked questions

Can blurred vision clear up on its own?

That depends on the cause. Temporary irritation caused by tiredness, dry air or a speck of dust may clear up on its own. Blurred vision caused by a refractive error or an eye condition usually does not resolve on its own and requires correction or treatment by a professional. If you are unsure or if the symptoms last longer than a few hours, have it assessed by your optician, optometrist or ophthalmologist.

Why do I have blurred vision when I’m wearing my contact lenses?

Blurred vision whilst wearing contact lenses can be caused by dirty or damaged lenses, the wrong prescription, dry eyes or a poor fit. Check that your lenses are clean and well looked after, and that you are not wearing them for too long. If your vision remains blurred, contact your optician or contact lens specialist for a check-up.

Is blurred vision always a sign of an eye condition?

No, blurred vision often has a harmless cause, such as a refractive error, tiredness or dry eyes. However, it can sometimes indicate an eye condition such as cataracts, glaucoma or a retinal problem. Conditions affecting the body other than the eye, such as diabetes or neurological problems, can also cause blurred vision. You should therefore always have it checked if it persists or occurs suddenly.

Should I see an ophthalmologist if my vision suddenly becomes blurred?

Yes, sudden blurred vision – particularly in one eye or accompanied by symptoms such as flashes of light, spots, pain or loss of peripheral vision – requires urgent consultation with an ophthalmologist. It may indicate a serious condition that requires immediate action. If you are in any doubt, please contact us immediately.

Author & updates

Author:

Publication date: 11 November 2026

Last updated: 11 November 2026

I am looking for