Minehiro Takimoto1, Ken Hayashi2,3, Hideyuki Hayashi4. 1. Hayashi Eye Hospital, Fukuoka, Japan. 2. Hayashi Eye Hospital, Fukuoka, Japan. hayashi-ken@hayashi.or.jp. 3. Hayashi Eye Hospital, 4-23-35 Hakataekimae, Hakata-ku, Fukuoka, 812-0011, Japan. hayashi-ken@hayashi.or.jp. 4. Department of Ophthalmology, School of Medicine, Fukuoka University, Fukuoka, Japan.
Abstract
PURPOSE: To investigate the effect of a capsular tension ring (CTR) on the prevention of marked decentration and tilt of the intraocular lens (IOL), severe anterior capsule contraction, and refractive prediction error after cataract surgery. METHODS: Forty-seven eyes of 43 patients that had an implantation of a CTR during phacoemulsification surgery due to zonular instability (CTR group), and 34 fellow eyes that did not receive a CTR (no-CTR group) were enrolled. The degree of IOL decentration and tilt and the anterior capsule opening area were measured using a Scheimpflug videophotography system. RESULTS: No significant differences were found between the two groups in the mean degree of IOL decentration (0.34 mm in the CTR group, 0.29 mm in the no-CTR group; P=0.1401), tilt angle (2.82 degrees in the CTR group, 2.56 degrees in the no-CTR group; P=0.3173), anterior capsule opening area (24.3 mm2 in the CTR group, 23.6 mm2 in the no-CTR group; P=0.7620), or refractive prediction error (P=0.3459). CONCLUSION: In eyes with either zonular dehiscence or weakness, a CTR can prevent marked IOL decentration and tilt and severe anterior capsule contraction, and may lead to prevention of refractive prediction error.
PURPOSE: To investigate the effect of a capsular tension ring (CTR) on the prevention of marked decentration and tilt of the intraocular lens (IOL), severe anterior capsule contraction, and refractive prediction error after cataract surgery. METHODS: Forty-seven eyes of 43 patients that had an implantation of a CTR during phacoemulsification surgery due to zonular instability (CTR group), and 34 fellow eyes that did not receive a CTR (no-CTR group) were enrolled. The degree of IOL decentration and tilt and the anterior capsule opening area were measured using a Scheimpflug videophotography system. RESULTS: No significant differences were found between the two groups in the mean degree of IOL decentration (0.34 mm in the CTR group, 0.29 mm in the no-CTR group; P=0.1401), tilt angle (2.82 degrees in the CTR group, 2.56 degrees in the no-CTR group; P=0.3173), anterior capsule opening area (24.3 mm2 in the CTR group, 23.6 mm2 in the no-CTR group; P=0.7620), or refractive prediction error (P=0.3459). CONCLUSION: In eyes with either zonular dehiscence or weakness, a CTR can prevent marked IOL decentration and tilt and severe anterior capsule contraction, and may lead to prevention of refractive prediction error.
Authors: Francis W Price; Richard J Mackool; Kevin M Miller; Paul Koch; Thomas A Oetting; A Tim Johnson Journal: Ophthalmology Date: 2005-03 Impact factor: 12.079