Symptom

Cloudy vision

Sudden clouding needs urgent care

Medical reviewer Mr Mohamed Mohyudin· Last recorded site review

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When to get urgent help

  • Sudden cloudy vision, especially in one eye
  • Cloudy vision with eye pain, redness or light sensitivity
  • Cloudy vision after an eye injury or chemical splash
  • Cloudy vision with flashes, many new floaters or a dark shadow

Common causes

Cloudy vision can come from the lens, cornea or tear film. These are common causes to read about next.

CataractsA gradually clouding lens makes vision hazy, dull and glare-prone.Dry eyeAn unstable tear film can blur or cloud vision until you blink.KeratoconusAn irregular cornea scatters light and can make vision look hazy.Corneal ulcerA painful red eye with cloudy vision needs prompt treatment.Diabetic retinopathySwelling of the central retina can cloud vision in diabetes.Age-related macular degenerationCentral haze or smudgy vision in older adults.

What can help

  • Book an eye test if clouding has built up slowly, as cataracts are a common treatable cause
  • Try lubricating drops if vision clears when you blink
  • Treat sudden clouding, pain or vision loss as urgent

Frequently asked questions

What causes cloudy vision?

Gradual clouding is often cataracts. Dry eye, corneal problems and retinal swelling can also cause haze. Sudden clouding in one eye needs urgent assessment.

Is cloudy vision the same as blurred vision?

They overlap. Cloudy vision often feels hazy or milky, as if looking through fog, while blurred vision feels out of focus. Both can share causes such as cataracts or dry eye.

Can cloudy vision from cataracts be treated?

Yes. Cataract surgery replaces the cloudy lens with a clear artificial one and is one of the most common and successful eye operations.

Your next step

Take this to your appointment

Write down what has changed, when it started, your current medicines and the questions you want answered. Take these to your eye-care appointment.

Patient resourcesFind care where you live →

Sudden loss of sight, severe eye pain or a dark curtain across vision needs immediate assessment. Do not wait to complete a worksheet.

Trusted sources

For general background, these organisations provide eye-health information. This list is further reading, not a record that they reviewed this article.