Cloudy vision feels as though a film or mist is in front of the eyes, dulling clarity. Cataract is the classic cause, but many other issues can produce a cloudy effect.
Key Causes
Cataracts scatter light within the lens, creating hazy, dim sight and glare. Corneal oedema, inflammation, dense floaters, and significant macular or vitreous haze from uveitis or haemorrhage can all cloud the view.
- Patients may describe frosted-glass or fog effects rather than simple blur
- Contact lens overwear can temporarily cloud the cornea
- Acute corneal hydrops in keratoconus causes sudden painful cloudiness
- Post‑operative inflammation may temporarily cloud vision after surgery
Evaluation
Slit‑lamp examination and retinal imaging help localise where the cloudiness originates. Treatment may involve surgery, medical therapy, or managing lens or corneal problems.
- Sudden onset cloudiness with pain or redness is an emergency
- Gradual cataract‑related changes can be monitored until surgery is appropriate
- Prompt treatment of infection or inflammation improves outcomes
- Underlying systemic disease such as diabetes should also be optimised
