Cataract classification: Difference between revisions
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==Classification== | ==Classification== | ||
The classification of cataracts is based on four different criteria. | The classification of cataracts is based on four different criteria. | ||
# Morphology, | # Morphology, | ||
# Age of Onset | # Age of Onset | ||
# Maturity | # Maturity | ||
# Etiology | # Etiology | ||
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|Morphology | |||
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*Anterior cortical cataract | *Anterior cortical cataract | ||
*Anterior polar cataract | *Anterior polar cataract | ||
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*Posterior polar cataract | *Posterior polar cataract | ||
*Posterior subcapsular cataract (PSC) | *Posterior subcapsular cataract (PSC) | ||
*After-cataract | *After-cataract | ||
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|Maturity | |||
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*Immature Senile Cataract (IMSC) - partially opaque lens, [[Optic disc|disc]] view hazy | |||
*Mature Senile Cataract (MSC) - Completely opaque lens, no disc view | |||
*Hypermature Senile Cataract (HMSC) - Liquefied cortical matter: '''Morgagnian Cataract''' | |||
*Congenital cataract | |||
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::*Immature Senile Cataract (IMSC) - partially opaque lens, [[Optic disc|disc]] view hazy | ::*Immature Senile Cataract (IMSC) - partially opaque lens, [[Optic disc|disc]] view hazy | ||
::*Mature Senile Cataract (MSC) - Completely opaque lens, no disc view | ::*Mature Senile Cataract (MSC) - Completely opaque lens, no disc view |
Revision as of 04:44, 24 September 2017
Cataract Microchapters |
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Cataract classification On the Web |
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Risk calculators and risk factors for Cataract classification |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Rohan Bir Singh, M.B.B.S.[2]
Overview
Classification
The classification of cataracts is based on four different criteria.
- Morphology,
- Age of Onset
- Maturity
- Etiology
Morphology |
|
|
Maturity |
|
|
- Immature Senile Cataract (IMSC) - partially opaque lens, disc view hazy
- Mature Senile Cataract (MSC) - Completely opaque lens, no disc view
- Hypermature Senile Cataract (HMSC) - Liquefied cortical matter: Morgagnian Cataract
- Congenital cataract
- Sutural cataract
- Lamellar cataract
- Zonular cataract
- Total cataract
- Secondary cataract
- Drug-induced cataract (e.g. Corticosteroids)
- Traumatic cataract
- Blunt trauma (capsule usually intact)
- Penetrating trauma (capsular rupture & leakage of lens material - calls for an emergency surgery for extraction of lens and leaked material to minimize further damage)
- Classified by location of opacity within lens structure (However, mixed morphology is quite commonly seen, e.g. PSC with nuclear changes & cortical spokes of cataract)
- Anterior cortical cataract
- Anterior polar cataract
- Anterior subcapsular cataract
- Nuclear cataract - Grading correlates with hardness & difficulty of surgical removal
- 1 - Grey
- 2 - Yellow
- 3 - Amber
- 4 - Brown/Black (Note: "Black cataract" translated in some languages (like Hindi) refers to Glaucoma, not the color of the lens nucleus)
- Posterior cortical cataract
- Posterior polar cataract (importance lies in higher risk of complication - posterior capsular tears during surgery)
- Posterior subcapsular cataract (PSC) (clinically common)
- After-cataract - posterior capsular opacification subsequent to a successful extracapsular cataract surgery (usually within 3 months - 2 years) with or without IOL implantation. Requires a quick & painless office procedure with Nd:YAG laser capsulotomy to restore optical clarity.