Cataract classification: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
m (Categories) |
||
Line 2: | Line 2: | ||
{{Cataract}} | {{Cataract}} | ||
{{CMG}} | {{CMG}} | ||
==Overview== | |||
==Classification== | ==Classification== | ||
Line 40: | Line 42: | ||
{{reflist|2}} | {{reflist|2}} | ||
[[Category:Ophthalmology]] | [[Category:Ophthalmology]] | ||
[[Category:Primary care]] | [[Category:Primary care]] | ||
{{WS}} | |||
{{WH}} |
Revision as of 17:31, 27 June 2016
Cataract Microchapters |
Diagnosis |
---|
Treatment |
Case Studies |
Cataract classification On the Web |
American Roentgen Ray Society Images of Cataract classification |
Risk calculators and risk factors for Cataract classification |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Classification
The following is a classification of the various types of cataracts. This is not comprehensive and other unusual types may be noted.
- Classified by etiology
- Age-related cataract
- 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.