All about capsular tension rings

PURPOSE OF REVIEW

To discuss capsular tension devices and recent evidence regarding their use.

RECENT FINDINGS

The capsular tension ring, modified capsular tension ring, and capsular tension segment are well established tools for use during phacoemulsification when zonular instability is present. Recent research has provided additional evidence of their benefits in decreasing intraoperative and postoperative complications.

SUMMARY

Endocapsular support devices allow for cataract surgery success in the setting of zonular instability.

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

BACKGROUND

The surgical management of cataract associated with extensive zonular loss presents a challenge for ophthalmic surgeon. Capsular Tension Ring (CTR) is commonly being used to stabilize the capsular bag in patients with zonular dialysis. CTR helps to avoid capsular collapse and vitreous presentation in AC during surgery and maintains the capsular bag, allowing the circular contour of the capsular bag, allowing intra ocular lens to be easily placed in the bag. The aim of the study was to know if there is any shift of IOL following use of CTR ring.

METHOD

We did a Ultrabiomicroscopy (UBM) examination to find out shift in PCIOL in cases in which CTR ring and compared it with cases without CTR ring.

RESULT

It was found out through UBM in this study that there is actually a posterior shift of PCIOL after use of CTR ring leading to hypermetropic correction needed after surgery.

CONCLUSION

It is suggested that posterior shift of IOL following use of CTR should be kept in mind and the IOL implanted should be of + 1.0 to 2.0 D more than that calculated preoperatively.