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Aziza Dhalai, Fadel Boumelhem, Steven Mowen, Aaron Johnson, Jason David, Andrew Pan, Rachel Lieberman; The Use of Capsular Tension Rings in Preventing Toric Intraocular Lens Rotation. Invest. Ophthalmol. Vis. Sci. 2022;63(7):1703 – F0021.
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© ARVO (1962-2015); The Authors (2016-present)
To assess the rotational stability of toric intraocular lenses (IOL) with and without the use of a capsular tension ring (CTR) in patients undergoing cataract surgery.
This study is a prospective, randomized clinical trial performed at a military medical center in Las Vegas, Nevada. The eyes of adult patients undergoing cataract surgery with corneal astigmatism greater than or equal to 1.0 diopter were randomized into either the control group or the treatment group. Standard-of-care phacoemulsification cataract surgery was performed using a Tecnis toric lens (Johnson and Johnson Vision) in both groups. In the control group, no CTR was used. In the treatment group, a MORCHER® EYEJET® preloaded single-use CTR was implanted immediately prior to the IOL. Eyes of every axial length were eligible to enroll, and a CTR size 14, 14A, or 14C w used depending on the axial length. Slit lamp photos using retroillumination to document the toric axis were taken on the first day, 1 week, 1 month, 3 months, and 6 months postoperatively. The toric axis was measured by blinded reviewers using computerized image software. The primary outcome was the difference between the preoperative intended toric axis and the measured toric axis on postoperative month 6.
The mean difference between intended and measured toric axis at 6 months postoperatively was 7.4 ± 7.2 degrees in the control group and 4.6 ± 4.7 degrees in the treatment group. The difference was not statistically significant. There were no complications related to the use of the capsular tension ring.
There is a non-significant trend towards fewer degrees of rotation with the addition of the capsular tension ring during cataract surgery. Additional study is needed to determine if this trend will be clinically significant.
This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May 1-4, 2022, and virtually.
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