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A study to evaluate whether CTR increases refractive unpredictability between predicted and actual IOL position.

V K Baranwal1, Santosh Kumar2, Avinash Mishra3

  • 1Senior Adviser (Ophthalmology), Command Hospital (CC), Lucknow, UP, India.

Medical Journal, Armed Forces India
|March 14, 2014
PubMed
Summary
This summary is machine-generated.

Capsular Tension Rings (CTR) stabilize the lens capsule during cataract surgery. However, using a CTR can cause a posterior shift in the intraocular lens (IOL), potentially requiring a stronger prescription.

Keywords:
Capsular tension ringRefractionUltrabiomicroscopy

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Area of Science:

  • Ophthalmology
  • Surgical Innovation
  • Intraocular Lens Technology

Background:

  • Cataract surgery with significant zonular loss poses challenges.
  • Capsular Tension Rings (CTR) are utilized to stabilize the capsular bag during such procedures.
  • CTR aids in preventing capsular collapse and facilitating intraocular lens (IOL) placement.

Purpose of the Study:

  • To investigate the potential shift in the position of the intraocular lens (IOL) after the implantation of a Capsular Tension Ring (CTR).

Main Methods:

  • Ultrabiomicroscopy (UBM) was employed to assess the position of the posterior chamber intraocular lens (PCIOL).
  • A comparative analysis was conducted between eyes that received a CTR and those that did not.

Main Results:

  • The study revealed a significant posterior shift of the PCIOL in eyes where a CTR was used.
  • This posterior displacement of the IOL resulted in a hypermetropic correction requirement post-surgery.

Conclusions:

  • The posterior shift of IOLs associated with CTR use should be anticipated by surgeons.
  • It is recommended to consider implanting an IOL that is 1.0 to 2.0 diopters stronger than preoperatively calculated to compensate for the shift.