Capsular Tension Rings are for the stabilization of the crystalline lens capsule with weak or partially absent zonules in adult patients undergoing cataract extraction with intraocular lens implantation.

Conditions associated with weak or partially absent zonules may include

  • primary zonular weakness (e.g., Marfan's syndrome)
  • secondary zonular weakness (e.g., trauma or vitrectomy)
  • zonulolysis
  • pseudoexfoliation (PEX) syndrome with zonular weakness
  • Marchesani's syndrome

Further utilities:

  • prevention of possible IOL luxation
  • prevention of one-sided capsular bag shrinkage
  • circular expansion of the capsular bag
  • ease of complicated surgical conditions
  • capsule stabilization in case of severe myopia