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1. Nuclear Sclerotic
2. Cortical
3. Posterior Subcapsular Cataracts
3 TYPES OF CATARACT BASED ON THE ANATOMY OF HUMAN LENS
1. Complication of other conditions such as intraocular inflammation (ex: chronic uveitis)
2. Steroid administration
3. Vitreoretinal surgery
4. External eye trauma
5. Systemic conditions such as diabetes mellitus
5 Contributory factors of POSTERIOR SUBCAPSULAR CATARACT (PSC)
1. Anterior Subcapsular Cataract (ASC)
2. Anterior Polar Cataract (APC)
3. Posterior Polar Cataract (PPC)
4. Mixed Cataract 5. Traumatic Cataract
6. Congenital Cataract
7. Diabetic Snowflakes Cataract
7 OTHER TYPES OF CATARACT
1. Iritis
2. Keratitis
3. Inflammation
4. Atopic dermatitis
5. Irradiation
6. Electrical burns
7. Ocular trauma
7 Anterior lens epithelial cells become necrotic from these variety of causes
1. inherited (multiple genetic or chromosomal disorders)
2. disorders of metabolism (galactosemia)
3. infections contracted while in the womb (rubella)
4. another disease of the mother during pregnancy
4 Possible Causes of Congenital Cataract:
1. posterior lenticonus
2. anterior segment dysgenesis
3. posterior pole tumors
4. Trauma
5. intrauterine infection, particularly rubella
Unilateral congenital cataract are usually isolated incidents and can be associated with 5 ocular abnormalities:
1. Hypoglycemia
2. Trisomy (Down, Edward, and Patau syndromes)
3. Myotonic dystrophy, infectious diseases (toxoplasmosis, rubella, cytomegalovirus, and herpes simplex)
4. Prematurity
Bilateral congenital cataract are usually inherited and associated with other 4 diseases:
1. Diabetes or elevated blood sugar
2. Steroid use (oral, IV, or inhaled)
3. Ultraviolet Exposure
4. Smoking
5. Ocular diseases: Pigmentosa, Uveitis, Retinitis
6. Ocular Trauma
7. Prior ocular surgery
8. Genetic predisposition
9. Nutritional deficiency
10. Low levels of antioxidants (Vit C, Vit E, carotenoids)
10 Risk factors for Cataract Development
1. Blunt trauma
2. Penetrating trauma with disruption of the lens capsule
2 Etiologies of Traumatic Cataract:
1. Nuclear - (center of the lens)
2. Subcapsular or cortical - may involve the lens material underneath the anterior or posterior lens.
2 Locations for CONGENITAL CATARACT: