Objective To compare quantitatively the clinical effects on patients with axial myopic astigmatism after cataract surgery using either a capsular tension ring combined with toric intraocular lens (IOL) implantation or simple toric IOL implantation. Methods This was a retrospective analysis. Patients with axial myopia who agreed to undergo modern cataract phacoemulsification combined with toric IOL implantation were selected from 2012 January to 2013 January. The selected patients had preoperative corneal astigmatism of ≥1.5 D, an axial length of >25.5 mm, and rule astigmatism as measured by corneal topography. The combined group received a toric IOL+CTR implantation (20 cases) and the simple group received toric IOL implantation only (13 cases). IOLMaster and Alcon provided online calculations and subjective refraction preoperatively. Subjective refraction and a slit lamp microscope were used to measure uncorrected distant visual acuity, best corrected visual acuity, residual astigmatism, and the toric IOL axis 6 months postoperatively. A t test, rank sum test and χ2 test were used to analyze the data. Results At 6 months postoperatively in the combined group, the toric IOL was located in the capsular sac. Only 2 patients had a slight rotation of about 2° d, and others had no rotation. In the simple group, the toric IOL was located in the sac, but the IOL had an axial rotation: 5 eyes rotation <10°, 7 eyes <20°, 1 eye <30°. The combined group had a residual astigmatism of -0.40±0.15 D at 6 months postoperatively, the predicted residual astigmatism was -0.36±0.11 D. There was no significant difference between actual residual astigmatism and predicted astigmatism (t=-1.647, P>0.05). The simple group had a residual astigmatism of -1.07±0.37 D at 6 months postoperatively, the predicted residual astigmatism was -0.40±0.12 D. The difference was statistically significant (t=-8.490, P<0.01). At postoperative 6 months, UCVA for the combined and simple groups was 4.6±0.1 and 4.5±0.1, respectively. The difference was statistically significant (t=2.443, P<0.05). Conclusion In patients with axial myopic astigmatism, CTR can effectively increase the rotation stability of a toric IOL, achieving the desired goal of correcting corneal astigmatism. There was an obvious improvement in visual acuity.
刘戈,刘洋,方军. 囊袋张力环联合散光IOL植入在轴性近视散光白内障患者中的应用. 中华眼视光学与视觉科学杂志, 2014, 16(3):181-184. DOI:10.3760/cma.j.issn.1674-845X.2014.03.013.
Liu Ge,Liu Yang,Fang Jun. Use of a capsular tension ring combined with toric intraocular lens implantation for patients with axial myopia after cataract surgery. Chinese Journal of Optometry Ophthalmology and Visual Science, 2014, 16(3):181-184.
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