Cataract

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Cataract

  1. 1. DEFINITION AND CLASSIFICATION OF CATARACT
  2. 2. ‘ CATARACTA’(LATIN)MEANING ‘WATERFALL’
  3. 3. DEFINITION: CATARACT IS CAUSED BY OPACIFICATION AND DEGENERATION OF LENS FIBRES ALREADY FORMED, THE FORMATION OF ABBERENT LENS FIBRES OR DEPOSITION OF OTHER MATERIALS IN THEIR PLACE.
  4. 4. CATARACT
  5. 6. <ul><li>ETIOLOGY: </li></ul><ul><li>EYE INJURY </li></ul><ul><li>SUN EXPOSURE </li></ul><ul><li>SMOKING </li></ul><ul><li>HYPERTENSION </li></ul><ul><li>KIDNEY DISORDERS </li></ul><ul><li>DIABETES MILLETUS </li></ul><ul><li>LONG TERM USE OF STEROIDS </li></ul><ul><li>TOXIC SUBSTANCES </li></ul><ul><li>HEREDITARY </li></ul>
  6. 7. <ul><li>PATHOGENESIS: </li></ul><ul><li>DEGENERATION </li></ul><ul><li>OPACIFICATION </li></ul><ul><li>DEPOSITION OF OTHER MATERIAL </li></ul><ul><li>ABNORMALITY OF LENS PROTEIN </li></ul><ul><li>DISORGANISATION OF FIBRES </li></ul>
  7. 8. <ul><li>   Blurred vision </li></ul><ul><li>  Need for frequent changes in your eyeglasses or contacts  </li></ul><ul><li>Trouble in driving at night ( Glare )  </li></ul><ul><li>Sensitivity to bright light  </li></ul><ul><li>Change in color vision ( yellow , orange , and red appear brighter and WHITE appears dull). </li></ul><ul><li>Polyopia and monocular diplopia </li></ul><ul><li>Coloured haloes </li></ul>SYMPTOMS:
  8. 9. BLURRED VISION DUE TO SCATTERING OF LIGHT ON THE RETINA
  9. 10. blurred vision
  10. 11. GLARED VIEW(TROUBLE DRIVING AT NIGHT)
  11. 12. CHANGE IN COLOUR VISION(DIMNESS)
  12. 13. <ul><li>CLASSIFICATION : </li></ul><ul><li>BASED ON : </li></ul><ul><li>MORPHOLOGY </li></ul><ul><li>AGE OF ONSET </li></ul><ul><li>MATURITY </li></ul><ul><li>ETIOLOGY </li></ul>
  13. 14. MORPHOLOGIC: 1.CAPSULAR CATARACT -ANTERIOR CAPSULAR CATARACT -POSTERIOR CAPSULAR CATARACT 2.SUB CAPSULAR CATARACT -ANTERIOR SUBCAPSULAR CATARACT -POSTERIOR SUBCAPSULAR CATARACT 3.NUCLEAR CATARACT 4.CORTICAL CATARACT
  14. 15. 5.LAMELLAR/ZONULAR CATARACT 6.SUTURAL CATARACT
  15. 16. - POSTERIOR SUBCAPSULAR CATARACT -CORTICAL CATARACT -NUCLEAR CATARACT -MATURE CATARACT
  16. 17. AGE OF ONSET: 1.CONGENITAL 2.INFANTILE 3.JUVINILE 4.PRE-SENILE 5.SENILE
  17. 18. CONGENITAL CATARACT
  18. 19. INFANTILE AND JUVINILE CATARACT
  19. 20. MATURITY: 1.INTUMESCENT CATARACT 2.IMMATURE CATARCT 3.MATURE CATARACT 4.HYPERMATURE CATARACT 5.MORGAGNIAN CATARCT
  20. 21. MATURE AND IMMATURE CATARACT
  21. 22. IMMATURE CATARACT
  22. 23. <ul><li>ETIOLOGIC: </li></ul><ul><li>TRAUMATIC CATARACT </li></ul><ul><li>METABOLIC CATARACT </li></ul><ul><li>TOXIC CATARACT </li></ul><ul><li>COMPLICATED CATARACT </li></ul><ul><li>INTRA UTERINE CATARACT </li></ul><ul><li>HERIDITARY CATARACT </li></ul><ul><li>RADIATIONAL CATARACT </li></ul><ul><li>ELECTRIC CATARACT </li></ul>
  23. 24. 9. CATARACT ASSOSCIATED WITH SKIN DISEASES-ICHTHYOSIS,ATOPIC DERMATITIS 10.CATARACT ASSOSCIATED WITH OSSEOUS DISEASES-PARATHYROID TETANY 11.CATARACT WITH MISCELLANEOUS DISEASES-DYSTROPHIA MYOTONICA,ALPORTS SYNDROME,DOWNS SYNDROME AFTER CATARACT
  24. 25. <ul><li>SUBJECTIVE CLASSIFICATION: </li></ul><ul><li>GRADE 0: CLEAR LENS </li></ul><ul><li>GRADE 1: SWOLLEN FIBRES AND SUB CAPSULAR OPACITIES </li></ul><ul><li>GRADE 2: NUCLEAR CATARACT AND VISIBLE LENS FIBRES </li></ul><ul><li>GRADE 3: STRONG NUCLEAR CATARACT WITH PERINUCLEAR AREA OPACITY </li></ul><ul><li>GRADE 4: TOTAL OPACITY </li></ul>
  25. 26. SUBJECTIVE CLASSIFICATION
  26. 27. THANK YOU !

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