Intraocular lens dislocation treatment

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Intraocular Lens Dislocation Treatment

Affects between 0.05% and 3% of patients who have undergone cataract surgery.

No. 1 symptom: Vision loss.

Its incidence increases 5 years after cataract surgery.

What is Intraocular Lens Dislocation?

Intraocular lens (IOL) dislocation is a rare condition that occurs in patients who have undergone cataract surgery. It involves the displacement of the implanted lens towards the vitreous cavity of the eye. Sometimes, the lens becomes decentered from the visual axis but does not fall into the vitreous cavity (a condition known as subluxation).

Displacement of the IOL can cause vision changes. If the lens falls into the vitreous cavity, it may produce traction due to the movement of the eye, which can lead to retinal detachment and/or vitreous hemorrhage.

What Causes It?

It is estimated that between 0.05% and 3% of patients who have undergone cataract surgery experience spontaneous IOL dislocation. Its incidence is higher around 5 years after the surgery.

The following conditions or prior procedures can increase the risk of IOL dislocation:

  • Crystalline pseudoexfoliation syndrome (PSX): Breakage of the fibers that support the natural lens (zonule).
  • High myopia (nearsightedness).
  • Previous surgical procedures: Such as glaucoma surgery or vitrectomy.
  • Eye injuries.

How Can It Be Prevented?

IOL dislocation cannot be prevented as it typically occurs spontaneously. However, patients who have undergone cataract surgery should have regular eye check-ups and immediately consult their ophthalmologist if they notice any vision loss or changes in vision.

Symptoms

The most common symptom of IOL dislocation is vision loss, although some patients may experience:

  • Blurred vision
  • Unfocused vision

Importantly, IOL dislocation does not cause pain.

Associated Treatments

  • If the IOL has fallen into the vitreous cavity, treatment involves performing a vitrectomy to remove the dislocated lens and implant a new one, or reposition the lens.
  • If the IOL is subluxated but has not fallen into the vitreous cavity, the surgeon can often reposition the lens without the need for a vitrectomy.