Cataract

Cataracts are an opacification or thickening of the lens within the globe and are the leading cause of blindness in the world 2

Visual deterioration occurs with increasing degrees of severity, and left untreated may present as complete blindness. The diagnosis is made clinically.

Common causes include:

Ocular ultrasound is performed when there is suspicion of posterior globe pathology but funduscopic visualization of the back of the eye is obscured by the opaque lens. 

Especially useful in acute cataract formation with increased fluid within the lens as in traumatic and osmotic cataract (hyperglycemia) as well as unsuspected lens injury. The affected lens is hypodense compared to the contralateral lens with a mean density difference of about 30 HU 3.

Treatment is surgical extraction of the lens nucleus from its capsule, and replacement with an intraocular lens implant into the native lens capsule.

Share article

Article information

rID: 1059
Tag: refs
Synonyms or Alternate Spellings:
  • Cataracts
  • Ocular cataract
  • Ocular cataracts

Support Radiopaedia and see fewer ads

Cases and figures

  • Case 1: ultrasound showing cataract
    Drag here to reorder.
  • Case 2: with retinal detachment
    Drag here to reorder.
  • Case 3
    Drag here to reorder.
  • Case 4
    Drag here to reorder.
  • Case 5: traumatic cataract
    Drag here to reorder.
  • Case 6: traumatic cataract
    Drag here to reorder.
  • Updating… Please wait.

     Unable to process the form. Check for errors and try again.

     Thank you for updating your details.