Influence of capsular tension ring on posterior capsule opacification in myopic eyes.
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Date
2014-03
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Abstract
Purpose: To determine the effect of a capsular tension ring (CTR) implantation in preventing posterior capsular
opacification (PCO) after cataract surgery in patients with high myopia. Materials and Methods: In this
prospective single‑surgeon standardized‑surgical‑procedure fellow‑eye comparison trial, 34 patients
with high myopia had phacoemulsification surgery. Although one eye received an acrylic intraocular
lens (IOL) and CTR, other eye received only an IOL as control. PCO, within the capsulorhexis overlap, was
documented by standardized digital retroillumination images at least 2 years post‑operatively, and the
percentage area of PCO was scored (scale 0%‑100%) using the POCOman software system. The PCO score
and the incidence of neodymium‑doped yttrium aluminum garnet (Nd: YAG) capsulotomy of groups, and
correlations between PCO score and presence of CTR, age, phaco time, refraction, and axial length (AL) were
determined. Results: The mean time interval from surgery to PCO measurement was 43.4 ± 11.2 months
for the eyes with a CTR and 43.1 ± 11.6 months for the controls (P = 0.91). The PCO score of the eyes with a
CTR was significantly lower than in the controls (5.9 ± 4.3 vs. 22.3 ± 12.2, respectively; P < 0.001). There were
statistically insignificant correlations between PCO score and pre‑operative refraction (r = 0.02; P = 0.90),
AL (r = 0.03; P = 0.80), phaco time (r = 0.11; P = 0.53), and patient’s age (r = 0.23; P = 0.55). No patient with a
CTR had a Nd: YAG laser capsulotomy, but it was six in controls (P = 0.025). Conclusions: CTR implantation
seems to be effective in reducing the PCO and Nd: YAG laser capsulotomy rates in high myopic eyes.
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Keywords
Capsular tension ring, cataract, intraocular lens, myopia, phacoemulsification, posterior capsular opacification
Citation
Halili Ismail, Mutlu Fatih Mehmet, Erdurman F Cüneyt, Gündoğan Fatih C, Kılıç Selim. Influence of capsular tension ring on posterior capsule opacification in myopic eyes. Indian Journal of Ophthalmology. 2014 Mar ; 62 (3): 311-315.