What are capsular tension rings made of?

Standard Capsular Tension Rings. The standard capsular tension ring or CTR is a flexible C-shaped device made of polymethylmethacrylate (PMMA)(Figure 1A). Each end has a blunt tipped eyelet to aid in insertion of the device.

What size capsular tension ring?

The standard Morcher CTR comes in three sizes based on uncompressed diameter: 12.3 mm (compresses to 10 mm, Morcher 14, used for axial length < 24 mm), 13 mm (compresses to 11 mm, Morcher 14C, used for axial length of 24-28 mm), and 14.5 mm (compresses to 12 mm, Morcher 14A, used for axial length > 28 mm).

How do I create a CTR?

CTR is the number of clicks that your ad receives divided by the number of times your ad is shown: clicks ÷ impressions = CTR. For example, if you had 5 clicks and 100 impressions, then your CTR would be 5%.

What is zonular dehiscence?

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

What is Zonulopathy?

Zonulopathy is a condition characterized by a lack of zonular support for the lens capsule due to zonular weakness or dialysis. This condition may encompass subluxation or dislocation of the lens.

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 the capsular bag?

Definition. The capsular bag is the capsule of the crystalline lens. This term applies especially to the capsule after removal of its content by extracapsular cataract extraction or phacoemulsification, usually through a circular anterior opening (capsulorrhexis).

What is a CTR form also known as?

A currency transaction report (CTR) is a bank form used in the United States to help prevent money laundering. This form must be filled out by a bank representative whenever a customer attempts a currency transaction of more than $10,000.

What kind of device is a capsular tension ring?

By increasing the likelihood of capsular bag placement of an intraocular lens, the risks associated with alternative fixation in the anterior chamber or to the iris and sclera can be lessened. The standard capsular tension ring or CTR is a flexible C-shaped device made of polymethylmethacrylate (PMMA) (Figure 1A).

What are the different types of capsular support devices?

Types of Capsular Support Devices 1 Standard Capsular Tension Rings. The standard capsular tension ring or CTR is a flexible C-shaped device made of polymethylmethacrylate (PMMA) (Figure 1A). 2 Modified Capsular Tension Rings. 3 Capsular Tension Segments. 4 Capsular Retention Hooks.

What are the contraindications for a capsular tension ring?

Absolute contraindications for a capsular tension ring are the presence of anterior or posterior capsular tears or any concern for bag compromise. A capsular tear may propagate due to the centrifugal forces exerted by the ring on the capsular bag. Two capsular tension rings have been approved by the U.S. Food and Drug Administration.

Can a tension ring be trapped in a capsule retractor?

The Chang modification makes it impossible for a capsule tension ring to become trapped in the loop portion of the device, which occasionally happened with the first-generation capsule retractor.