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Related Experiment Videos

Management of dislocated intraocular implants.

C K Chan1, A Agarwal, S Agarwal

  • 1Southern California Desert and Inland Retina Consultants, Palm Springs, California, USA.

Ophthalmology Clinics of North America
|January 15, 2002
PubMed
Summary

Implant dislocation can occur due to various factors, but surgical techniques are improving management. Repositioning dislocated intraocular lenses (IOLs) using methods like temporary haptic externalization offers effective visual recovery.

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Area of Science:

  • Ophthalmology
  • Surgical Techniques
  • Intraocular Lenses

Background:

  • Implant dislocation, including posterior chamber intraocular lenses (PCIOL) and anterior chamber intraocular lenses (ACIOL), can result from inadequate support or ocular trauma.
  • Factors like patient age, high myopia, previous vitrectomy, pseudoexfoliation syndrome, and connective tissue disorders increase the risk of implant dislocation.
  • Despite challenges, advancements in surgical techniques are making the management of dislocated intraocular lenses (IOLs) more feasible.

Purpose of the Study:

  • To review the causes and predisposing factors of intraocular lens (IOL) dislocation.
  • To discuss current and emerging surgical techniques for managing dislocated IOLs, including explantation, exchange, and repositioning.
  • To highlight the effectiveness of modern vitreoretinal techniques, particularly temporary haptic externalization, for optimal visual recovery.

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Main Methods:

  • Categorization of repositioning techniques into external (suturing) and internal (pars plana) approaches.
  • Discussion of recently accepted methods such as scleral loop fixation, snare approach, 25-gauge forceps, temporary haptic externalization, and perfluorocarbon liquids.
  • Emphasis on the utility of endoscopy for enhanced visualization during repositioning, despite potential limitations like lack of 3D view and a learning curve.

Main Results:

  • Temporary haptic externalization is presented as a method combining advantages of both external and internal approaches, enabling precise scleral fixation.
  • Endoscopy aids in precise haptic placement by improving visualization of critical anterior retropupillary structures.
  • Silicone plate implants may have characteristics that increase dislocation risk, and repositioning may lead to recurrence, often making removal the preferred option.

Conclusions:

  • Repositioning dislocated PCIOLs in the ciliary sulcus using modern techniques offers optimal visual recovery.
  • Avoiding the placement of a second IOL in the presence of a dislocated IOL is crucial to prevent increased surgical complexity and morbidity.
  • Management of dislocated IOLs, especially silicone plate types, requires careful consideration of techniques, with removal often being the safest choice to avoid recurrent issues.