Symptom

Cloudy vision

Sudden clouding needs urgent care

Medically reviewed by · Last reviewed 2026-07-06 · How review works

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.

Cataracts A gradually clouding lens makes vision hazy, dull and glare-prone. Dry eye An unstable tear film can blur or cloud vision until you blink. Keratoconus An irregular cornea scatters light and can make vision look hazy. Corneal ulcer A painful red eye with cloudy vision needs prompt treatment. Diabetic retinopathy Swelling of the central retina can cloud vision in diabetes. Macular degeneration Central 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.

Trusted sources

This page reflects established clinical guidance. For further reading, consult these authoritative eye-health organisations: