Is a capsular tension ring an implant?

The Capsular Tension Ring is a sterile, non·optical ocular implant that is permanently inserted into the Ciystalline lens capsular bag during intraocular lens surgery.

When do you use a capsular tension ring?

Indications and Contraindications. The best candidate for a standalone standard capsular tension ring is a patient with mild diffuse zonular weakness or focal zonular weakness extending fewer than three to four clock hours.

What size capsular tension ring?

Standard capsular tension ring (Fort Worth, Texas, USA) and is available in three sizes: 12.3mm (compresses to 10.0mm), 13.0mm (compresses to 11.0mm), and 14.5mm (compresses to 12.0 mm).

Is a Malyugin ring a capsular tension ring?

Using an injector is difficult because the fixation element is attached to a ring at a location that prevents the CTR from being fully retracted inside the injector lumen. The Malyugin modified CTR (Type 10G, Morcher GmbH) is a capsular supporting device based on Cionni’s original concept.

What is zonular weakness?

Zonular weakness can be caused by disease or trauma, and its presence can make cataract surgery more challenging. Fortunately, there are adjunctive devices to effectively manage it and achieve successful outcomes. Causes. Certain diseases of the eye are associated with zonular weakness or insufficiency.

What is CTR in eye surgery?

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.

What is zonular dehiscence?

Definition. Rupture of the fibrous strands connecting the ciliary body and the crystalline lens of the eye. [

What are zonular fibers?

The zonules are the tiny thread-like fibers that hold the eye’s lens firmly in place. The zonules also work with the ciliary muscles to help the lens accommodate (change focus). The zonule fibers tighten and pull the lens for near vision. They relax as the lens flattens for distance vision.

What are loose zonules?

Loose zonules complicate cataract surgery because their laxity makes removal of the nucleus and cortex challenging and limits stability of the IOL. In some patients we are able to detect zonular laxity during the preoperative consultation.

When do you insert a CTR?

Timing of CTR insertion will vary based on the surgical circumstances, but ideally a CTR should be inserted after the cataract and cortex have been removed and prior to insertion of the IOL.