Ectopia lentis

Ectopia lentis refers to subluxation or dislocation of the lens of the eye secondary to dysfunction or disruption of zonular fibers. 

Marfan syndrome, homocystinuria and Weil-Marchesani syndrome account for 95% of cases 3

Sonographic features of lens malposition differ based upon the degree of luxation as follows 5:

  • subluxation
    • unilateral deviation of the lens margin posteriorly into the anechoic vitreous body
    • the contralateral margin remains fixed adjacent to the iris
  • complete luxation
    • the lens assumes a dependent position in the vitreous
    • demonstrates free mobility with eye movements

Associated findings include:

An anterior dislocation/subluxation carries greater complications than a posterior one. Such complications include:

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Article information

rID: 1257
Section: Gamuts
Synonyms or Alternate Spellings:
  • Dislocation of the lens
  • Lens dislocation
  • Lens subluxation
  • Subluxation of the lens

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Cases and figures

  • Case 1: ultrasound
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  • Case 2: from trauma
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  • Case 3: on right
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  • Case 4: on left
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  • Case 5: post trauma on right
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  • Case 6
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  • Case 7
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  • Case 8: post-traumatic
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