Cataract classification: Difference between revisions

Jump to navigation Jump to search
Line 6: Line 6:


==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
:* {| class="wikitable" !Basis of Classification !Subtypes  !Properties |- |Morphology |
{| class="wikitable"
!
!
!
|-
|Morphology
|
*Anterior cortical cataract
*Anterior cortical cataract
*Anterior polar cataract
*Anterior polar cataract
Line 19: Line 25:
*Posterior polar cataract  
*Posterior polar cataract  
*Posterior subcapsular cataract (PSC)
*Posterior subcapsular cataract (PSC)
*After-cataract  
*After-cataract
*: ! |- |Age of Onset |
|
:*Immature Senile Cataract (IMSC) - partially opaque lens, [[Optic disc|disc]] view hazy
|-
:*Mature Senile Cataract (MSC) - Completely opaque lens, no disc view
|Maturity
:*Hypermature Senile Cataract (HMSC) - Liquefied cortical matter: '''Morgagnian Cataract'''
|
:*Congenital cataract ! |- |Maturity | ! |- |Etiology | ! |}
*Immature Senile Cataract (IMSC) - partially opaque lens, [[Optic disc|disc]] view hazy
:*Classified by etiology
*Mature Senile Cataract (MSC) - Completely opaque lens, no disc view
:*Age-related cataract
*Hypermature Senile Cataract (HMSC) - Liquefied cortical matter: '''Morgagnian Cataract'''
*Congenital cataract
|
|-
|
|
|
|}
::*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

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Cataract from other Diseases

Epidemiology and Demographics

Risk Factors

Screening

Natural History, Complications and Prognosis

Diagnosis

History and Symptoms

Physical Examination

Laboratory Findings

X Ray

CT

MRI

Other Imaging Findings

Other Diagnostic Studies

Treatment

Medical Therapy

Surgery

Primary Prevention

Secondary Prevention

Cost-Effectiveness of Therapy

Future or Investigational Therapies

Case Studies

Case #1

Cataract classification On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Cataract classification

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Cataract classification

CDC on Cataract classification

Cataract classification in the news

Blogs on Cataract classification

Directions to Hospitals Treating Cataract

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.

  1. Morphology,
  2. Age of Onset
  3. Maturity
  4. Etiology
Morphology
  • Anterior cortical cataract
  • Anterior polar cataract
  • Anterior subcapsular cataract
  • Nuclear cataract
  • Posterior cortical cataract
  • Posterior polar cataract
  • Posterior subcapsular cataract (PSC)
  • After-cataract
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
  • 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.

References

Template:WS Template:WH