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M. Kotoula, C.H. Karabatsas, A. Katsanos, E. Tsironi, E. Kotsimpou, C.Z. Dimitrios; Capsular Tension Rings: A Useful Tool for Successful Completion of Cataract Surgery With Zinn’s Zonule Instability. Five Years Experience . Invest. Ophthalmol. Vis. Sci. 2006;47(13):659.
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© ARVO (1962-2015); The Authors (2016-present)
To study the intraoperative and postoperative efficacy of the use of capsular tension rings (CTR) in cataract surgery complicated by Zinn zonule instability.
Retrospective chart review of 47 eyes from 46 patients who underwent cataract surgery from May 2001 to November 2005 in the Ophthalmology Department, University of Thessaly, Larissa, Greece.
Of the capsular tension rings used, 39 were Alcon ReformTM, 1 was MorcherTM and 7 were RaynerTM . The decision of CTR use was taken preoperatively in 16 cases (34%) due to post–traumatic cataract (4 eyes, 8.5%), phacodonesis (6 eyes, 12.8%), pseudoexfoliation (5 eyes, 10.6%) or high myopia (1 eye, 2.2%). Perioperative decision of CTR use was taken in 31 eyes (66%), in the majority of cases due to instability during capsulorrhexis (25 eyes, 53.2%), whereas in 17 eyes (36.2%) the CTR was inserted after phaco was initiated. Phaco with PC–IOL was successfully completed in 36 cases (76.6%). Two eyes (4.2%) received an AC–IOL after phaco. Of the remaining 9 cases (19.1%), 3 were planned ECCE, while the operation was converted to an ECCE in 5 eyes (10.6%) despite the use of CTR. Only in one eye (2.1%) the CTR had to be removed together with the capsular bag (intracapsular extraction). Average follow–up time was 6.3 months (SD: 5.8). Best corrected Snellen visual acuity at last follow–up visit was ≤0.3 in 5 eyes (10.6%), 0.31–0.69 in 8 eyes (17%) and ≥0.7 in 28 eyes (59.6%). IOL decentration was observed postoperatively in 3 cases (6.4%), whereas posterior capsule opacification was seen in 2 cases (4.25%) at last follow–up visit.
Capsular tension rings appear effective in cataract surgery in the case of compromised zonular integrity. Postoperative results were encouraging in our series.
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