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Lens & Cataract

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cataract
Localized lens opacity caused by the glaucoma filtration tube trauma.
Traumatic Cataract

  • Most common complication of non-perforating and perforating injuries to the globe.
  • Intraocular trauma by surgical instruments, lodged foreign body or intraocular filtration tube is also a possible cause.
  • Clinical features:
    • Cataract formation after non-perforating injuries such as contusion or concussion may occur without any damage to the lens capsule
    • The cataract formation may be slowly progressive or mature suddenly
    • It is not always easy to observe initial changes of the lens
    • Vossius' ring can be seen as circular iris pigment imprinted on the surface of the lens anterior capsule
    • Opacification can occur in a variety of lens structures resulting in discrete, punctate subepithelial changes, or deep in the cortex with the typical rosette (flower-shaped) opacity
    • Trauma may also produce anterior or posterior subcapsular opacities.

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