Capsular tension ring (CTR)
An open, C-shaped PMMA ring inserted into the capsular bag to distribute tension and stabilize it when there is zonular weakness or dehiscence.
How it is used
Phacoemulsification with weak zonules (pseudoexfoliation, high myopia, lens subluxation, prior vitrectomy) to prevent bag dislocation and facilitate IOL placement.
Clinical tip
Implanting it too early can make cortex removal more difficult, while implanting it late can be complicated by posterior capsule fluctuations.
Sources
This entry is part of the Instriq catalog, researched and written per specialty from real web research -- never generated or invented without verification -- and reviewed skeptically and independently before publication. How this catalog is written.
Image: Akiyao, University of Michigan Medical School, Wikimedia Commons. License CC BY-SA 3.0. View original source.
