What Causes Blurred Vision?

What Causes Blurred Vision?

Blurred vision is one of the most common reasons people book an eye test. Sometimes it's simply because your prescription has changed, while in other cases it may be a sign of an underlying eye condition that needs prompt attention.

Understanding what causes blurred vision can help you decide when it's time to seek professional advice.

1. Your Glasses Prescription Has Changed

The most common cause of blurred vision is a change in your prescription.

You may notice:

• Difficulty reading road signs.

• Blurry TV subtitles.

• Struggling to read small print.

• Needing to hold your phone closer or further away.

Fortunately, this can usually be corrected with an updated pair of prescription glasses.

2. Dry Eyes

Dry eyes can make your vision fluctuate throughout the day.

Symptoms often include:

• Burning or stinging eyes.

• Watering.

• Gritty sensation.

• Vision that clears after blinking.

Dry eye syndrome becomes more common with age and prolonged screen use.

3. Eye Strain

Spending hours using computers, tablets or smartphones can leave your eyes feeling tired.

Symptoms include:

• Temporary blurred vision.

• Headaches.

• Difficulty focusing.

• Tired eyes.

Following the 20-20-20 rule can help reduce digital eye strain.

4. Cataracts

Cataracts develop gradually as the natural lens inside the eye becomes cloudy.

People often notice:

• Blurred or misty vision.

• Increased glare.

• Difficulty driving at night.

• Colours appearing duller.

Cataracts are common with ageing and can usually be treated successfully with surgery.

5. Diabetes

Diabetes can affect the tiny blood vessels inside the retina, leading to changes in vision.

Blurred vision can sometimes be an early warning sign that blood sugar levels are not well controlled.

6. Age-Related Macular Degeneration (AMD)

AMD affects the central part of your vision.

People may notice:

• Distorted straight lines.

• Difficulty recognising faces.

• Problems reading.

• Blurred central vision.

Early diagnosis is extremely important.

7. Glaucoma

Glaucoma usually develops slowly and often has no symptoms in its early stages.

Regular eye examinations are essential because permanent vision loss can occur before people realise anything is wrong.

8. Eye Infection

Eye infections may cause blurred vision alongside:

• Redness.

• Pain.

• Discharge.

• Sensitivity to light.

These symptoms should always be assessed promptly.

When Is Blurred Vision an Emergency?

Seek urgent medical attention if blurred vision comes on suddenly, especially if it is accompanied by:

• Severe eye pain.

• Flashes of light.

• A sudden increase in floaters.

• Loss of part of your vision.

• Double vision.

• Weakness or difficulty speaking.

These symptoms may indicate a serious eye or medical emergency.

When Should You Book an Eye Test?

If your vision has gradually become blurred or your current glasses no longer seem as effective, it's time to arrange a comprehensive eye examination.

Regular eye tests help detect changes in your prescription while also checking the health of your eyes.

The Bottom Line

Blurred vision is often caused by something simple, such as an outdated prescription, but it can also indicate an eye condition that requires treatment.

If you've noticed any changes in your eyesight, don't ignore them. A professional eye examination is the best way to identify the cause and ensure you receive the right advice.

Whether you need your first pair of glasses or an updated prescription, SpexNation offers a wide range of stylish frames with quality prescription lenses included, helping you enjoy clear, comfortable vision every day.