2022年12月1日 · Capsular support devices such as capsular tension rings (CTRs) can help facilitate successful surgery in eyes with zonular issues by improving bag stability and centration. When positioned in the bag, the standard C-shaped ring works by exerting an outward force that redistributes tension from areas of intact zonules to strength­en areas of ...

Modified capsular tension rings, or Cionni rings, were developed to address this issue (Figure 1B). Because they can be permanently sutured to the sclera, they are indicated for advanced zonular weakness, more than four clock hours of weak zonules, and progressive zonulopathy.

Capsular tension rings are small, circular devices made of flexible, biocompatible material. They are inserted into the eye during cataract surgery to help stabilize the lens capsule, which is the thin, transparent membrane that surrounds the natural lens.

2007年11月28日 · The capsular tension ring (CTR), a circular polymethylmethacrylate (PMMA) filament designed to be placed within the capsular bag, creates outward forces, thereby redistributing zonular tension.

Capsular tension ring sizing is another critical aspect, as improper sizing can compromise the device’s effectiveness and increase the risk of complications. How CTRs Support the Capsule During Surgery. During cataract surgery, the lens capsule must remain stable to facilitate the removal of the cloudy lens and the insertion of an IOL. In ...

The capsular tension ring (CTR) was first described in 1991 by Hara and coauthors (1991). They named it an “equator ring”, designed to maintain the circular contour of the capsular bag after lens removal during cataract surgery.

A capsular tension ring (CTR) can be a useful tool for ophthalmologists to have on hand during surgery. Two physicians discussed the available products, when the best time is to use them, and methods for good placement.

2024年10月30日 · A capsular tension ring (CTR) is an ophthalmic device used during cataract surgery to support the weakened capsular bag and prevent capsular contraction. Various types of CTRs exist, including open loop and closed loop, and are crafted from biocompatible materials such as PMMA and silicone.

Small-incision phacoemulsification with endo-capsular posterior chamber intraocular lens (PCIOL) fixation has become the standard of care in cataract management because of numerous intraoperative and postoperative advantages.

2019年8月1日 · Capsular tension rings are flexible plastic loops which are designed to exert outward force at the capsular bag equator to help distribute forces and help support areas of zonular loss.