CATARACT- TYPES & CAUSES
|
TYPES OF CATARACT |
CAUSES |
|
Posterior subcapular |
Myotoic dystrophy Wilson’s disease DM Atopic dermatitis Down’s syndrome Corticosteroids Ionizing radiation |
|
Anterior subcapular |
Wilson’s disease Down syndrome Senile cataract Galactosemia |
|
Anterior capsular |
Voissious ring (Blunt trauma) |
|
Nuclear |
Cigarette smoking Congenital rubella |
|
Cortical |
Stickler syndrome Senile cataract |
|
Anterior capsule (Polar) |
Penetration of cornea Congenital cataract |
|
Posterior capsular (Polar) |
Congenital cataract |
|
DISEASE |
TYPE OF CATARACT |
|
Myotonic dystrophy |
Christmas tree cataract Blue dot cortical cataract Posterior subcapular cataract |
|
Wilson’s disease Copper deposition (Chalcosis) Penetrating trauma |
Sunflower cataract |
|
Diabetes mellitus |
Snowflake cataract or Snowstrom cataract |
|
Down’s syndrome |
Snowflake cataract |
|
Hypoparathyroidism (Hypocalcemia) Hypovitaminosis D |
Discrete white cortical opacities Congenital lamellar (zonular) cataract |
|
Atopic dermatitis |
Blue dot cortical cataract Posterior subcapular cataract |
|
Congenital rubella |
Nuclear cataract Total congenital cataract |
|
Galactosemia |
Oil drop cataract Dust like lenticular opacities |
|
Complicated cataract (Iridocyclitis, high myopia) |
Posterior cortical bread’s crumb appearance Polychromatic lusture Rainbow cataract |
|
Blunt trauma |
Voissius ring on anterior surface of lens Rosette shaped cataract |
Exam Important
- Most common cause of cataract is Age related.
- Oil drop cataract is characteristic of Galactosemia.
- Cataract in galactosemia is the only reversible cataract.
- Polyopia/diplopia is seen in Cortical cataract.
- The commonest type of cataract in adults is Cortical cataract.
- Drug causing cataract? Dexamethasone.
- Sunflower cataract is seen in Wilson’s disease.
- Sunflower cataract is associated with Chalcosis.
- Sunflower cataract is due to deposition of Copper.
- Snowflake cataract is associated with Juvenile diabetes.
- A true diabetic cataract is also known as Snow-storm cataract.
- Rossette shaped cataract is seen in Blunt trauma to eye.
- Posterior subcapsular cataract is most visually handicapping.
- Most common type of cataract following radiation is Posterior subcapsular.
- Intumescent cataract is associated with Phacomorphinc glaucoma.
- Diabetic cataract is due to accumulation of Sorbitol.
- Complicated cataract is associated with Uveitis, Retinitis pigmentosa & Degenerative myopia.
- Minimum vision loss with Blue dot cataract.
- Most common type of congenital cataract is Blue dot.
- Congenital morgagnian cataract is a feature of Rubella cataract.
- Christmas tree cataract is seen in Myotonic dystrophy.
Click Here to Start Quiz
