J Korean Ophthalmol Soc.  1999 Oct;40(10):2759-2765.

The Effect of Capsular Tension Ring on Shape of Capsular Bag, Capsular Opening, and Intraocular Lens

• Lee DH
• Son HW
• Lee HY
• Joo CK

Abstract

This study was preformed to evaluate the effect of the capsular tension ring (CTR) on the shape of capsular bag, capsular opening following continuous curvilinear capsulorrhexis (CCC), and intraocular lens (IOLs). After removal of corneal button of piggy eye, phacoemulsification was performed. New designs of IOL and CTR (CTR-98A, Lucid Korea, Korea) were inserted in the bag. The posterior aspect of piggy eye was examined with the modified Miyake technique for measuring a configuration of capsular bag and capsular opening. For evaluation of CTR effect on IOL's deformity in rabbit, lens was removed using phacoemulsification technique and IOL was implanted in the capsular bag with/without CTR. IOLs were removed from enucleated eye after 3 months of operation, those shapes were compared with normal shape of IOLs. The differences of maximal and minimal diameter of capsular bag and CCC were markedly decreased in the CTR groups compared with that in the groups without CTR (p<0.05). The shape of IOLs determined as the distance between the ends of haptics from haptic to haptic was more preserved in the CTR groups compared with that in the groups without CTR (p<0.05). These results indicate that CTR would be useful for preservation of integrity of capsular bag, CCC shape, and IOL shape. It is also expected that CTR can prevent an unevenful stress of capsular bag and a contraction of capsular opening create by CCC leading to IOL decenteration.

Keyword

Capsular bag; Continuous curvilinear capsulorrhexis(CCC); Capsular tension ring(CTR); Intraocular len(IOL)

MeSH Terms

Capsulorhexis
Congenital Abnormalities
Korea
Lenses, Intraocular*
Phacoemulsification