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Dislocated Lens

DESCRIPTION: Lens dislocation may be partial or complete, and may be hereditary or result from trauma. If hereditary, it is usually bilateral and associated with other disorders (e.g., aniridia, Marfan's syndrome). It may be complicated by cataract formation. Vision is blurred if the lens is dislocated out of the line of vision. If dislocation is partial and the lens is clear, visual prognosis is good. Traumatic lens dislocation can follow a blow to the eye. If the dislocation is partial, the eye may be asymptomatic, but if the lens has become totally detached and is floating in the vitreous, there is blurred vision. A quivering iris may be a symptom of lens dislocation, due to the lack of lens attachment and support. Iritis and glaucoma are common complications.

TREATMENT: Dislocated lenses are best left untreated when there are no complications.

If a dislocated lens becomes opaque, surgical removal should be delayed as long as possible because vitreous loss and subsequent retinal detachment are common complications of such surgery. If uncontrollable glaucoma occurs, lens extraction is necessary, in spite of the risks involved.

Reading lenses and/or aphakic lenses may be needed.

IMPLICATIONS: (see also description for Aniridia) The child with a dislocated lens may need extra time for tasks requiring clear vision, and may exhibit unusual head positions as he exerts extra energy to see.


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