COMPLICATED CATARACT

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COMPLICATED CATARACT

• Prepared by
• Aizuddin Hidrus
• Mohd Zakariyya Bin Kamil

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DEFINITION OF COMPLICATED CATARACT

• It means opacification of the lens secondary to
  local(ocular) or systemic disease

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COMPLICATED CATARACT DUE TO OCULAR CAUSES

• Ocular disease- disturbance of the nutrition of
  the lens and accumulation of toxins in the
  aqueous.
• The opacity usually starts in the posterior part
  of the cortex in the axial region(posterior
  cortical) as the capsule here is very thin and
  the subcapsular epithelium is absent allowing
  easy passage of toxins inside the lens.
• Examples
• 1)perforated central corneal ulcer
• 2)chronic glaucoma
• 3)iridocyclitis
• 4)chorio-retinitis
• 5)retinal deatchment
• 6)intraocular tumors
• 7)high myopia
• 8)Retinitis pigmentosa
• 9)Subluxation or dislocation of the lens
•  

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COMPLICATED CATARACT DUE TO SYSTEMIC DISEASES

• 1)Diabetic cataract
• a)Snow flakes cataract(true diabetic cataract)
• -It occurs typically in young type 1
  diabetics(insulin dependent)
• -It starts as fluid vacuoles then a cloud of
  opacities resembling snow-flakes appear all
  over the lens and finally becomes totally milky
  white.
• b)Pre-Senile cataract
• -It stimulates senile cataract but it develops at
  an earlier age
• 2)Hypo-paratyrodism
• 3)Severe anemia
• 4)Toxic(Naphthalene,didnitrophenol,ergot,thalium,
  and systemic cortisone)
• 5)Radiation(infra red in glass blowr cataract,x
  ray ,electric cataract and ultrasonic radiation)
• 6)Other systemic diseasesatopic
  dermatitis,myotonia dystrophica,sclerodermia,mongo
  lism, and cretinism.)

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DIAGNOSIS OF COMPLICATED CATARACT

• -Positive history of ocular or systemic
  diseases.
• -The age may be suggestive (young age).
• -The opacity starts in the posterior subcapsular
  area,shows polychromatic luster )characteristic
  rainbow display of colors) seen on slit lamp
  examination .
• -The opacity may progress to total opacity with
  chalky white appearance (excessive calcium
  deposition).
• -The eye shows sign of the original disease
  e.gKPs of iridocyclitis,High intraocular pressure
  or bad projection of light in retinal detachment.
•  

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management

• -retinal function should be good
• -If the opacity is total,retina cannot be seen
  ,so Ultrasonography is mandatory
• -Cataract extraction is done by extra capsular
  cataract extraction .
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THANK YOU