|
|
Visual Outcome of the Toric Intraocular Lens in Eyes with Low Corneal Astigmatism |
Yana Fu, Yuyu Zhao, Man Hu, Jiaojiao Kou, Dongjie Chen, Yun'e Zhao |
Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China |
|
|
Abstract Objective: To evaluate the results of a Toric intraocular lens (IOL) for correction of low preoperative astigmatism in cataract patients. Methods: In this prospective, case series study, 65 eyes (56 cataract patients) were enrolled from January to December 2016 from Eye Hospital, Wenzhou Medical University,all patients were divided into 2 groups: A Toric group (n=33) with implantation of a Toric IOL (Acrysof IQ Toric IOL, Alcon, SN6AT2 and SN6AT3); an IQ group (n=32) with implantation of a non-Toric IOL (Acrysof IQ IOL, Alcon, SN60WF). Uncorrected distance visual acuity (UDVA, LogMAR), best corrected distance visual acuity (CDVA, LogMAR), preoperative corneal astigmatism, residual refractive error, and the axis of the toric IOL were measured. UDVA and CDVA were measured preoperatively and 3 months after surgery. A vector analysis of postoperative residual astigmatism was performed and compared between the groups. Data were statistically analyzed using an independent samples t test and non-parametric rank sum test. Results: The preoperative CDVA was 0.39 in the Toric group and 0.30 in the IQ group. At 3 months after surgery, the UDVA in the Toric group was 0.09, which was significantly better than that in the IQ group (Z=-2.802, P=0.005). The median residual astigmatism in the Toric group was 0.5 D, which was significantly smaller than that in the IQ group (1.00 D, Z=-3.636, P<0.001). Vector analysis showed that the difference in the mean vector J0 between the Toric group and IQ group was 0.11 D (t=1.456, P=0.151), and that of J45 was 0.11 D (t=1.998, P=0.050). Conclusions: Compared with non-Toric IOLs, Toric IOLs (SN6AT2 and SN6AT3) are more efficient for the correction of low corneal astigmatism (≤1.0 D)
|
Received: 19 December 2018
|
Fund:Public Welfare Social Development Project of Wenzhou Science and Technology Bureau (Y20160440) |
Corresponding Authors:
Yun'e Zhao, Eye Hospital, Wenzhou Medical University, Wenzhou 325027, China(Email: zyehzeye@126.com)
|
|
|
|
[1] |
Ferrer-Blasco T, Montés-Micó R, Peixoto-de-Matos SC, et al. Prevalence of corneal astigmatism before cataract surgery. J Cataract Refract Surg, 2009, 35(1): 70-75. DOI: 10.1016/j.jcrs. 2008.09.027.
|
[2] |
Yuan X, Song H, Peng G, et al. Prevalence of corneal astigmatism in patients before cataract surgery in northern China. J Ophthalmol, 2014, 2014: 536412. DOI: 10.1155/2014/
|
53 |
6412.
|
[3] |
Coloma-González I, González-Herrera M, Mengual-Verdú E, et al. Limbal relaxing incisions and cataract surgery: Our experience. Arch Soc Esp Oftalmol, 2007, 82(9): 551-554.
|
[4] |
Lehmann RP, Houtman DM. Visual performance in cataract patients with low levels of postoperative astigmatism: Full correction versus spherical equivalent correction. Clin Ophthalmol,2012, 6: 333-338. DOI: 10.2147/OPTH.S28241.
|
[5] |
Thibos LN, Wheeler W, Horner D. Power vectors: An application of Fourier analysis to the description and statistical analysis of refractive error. Optom Vis Sci, 1997, 74(6): 367-375.
|
[6] |
Aujla JS, Vincent SJ, White S, et al. Cataract surgery in eyes with low corneal astigmatism: Implantation of the Acrysof IQ Toric SN6AT2 intraocular lens. J Ophthalmic Vis Res, 2014,
|
9( |
3): 324-328. DOI: 10.4103/2008-322X.143369.
|
[7] |
Ernest P, Potvin R. Effects of preoperative corneal astigmatism orientation on results with a low-cylinder-power toric intraocular lens. J Cataract Refract Surg, 2011, 37(4): 727-732. DOI: 10.1016/j.jcrs.2010.11.026.
|
[8] |
Kessel L, Andresen J, Tendal B, et al. Toric intraocular lenses in the correction of astigmatism during cataract surgery: A systematic review and Meta-analysis. Ophthalmology, 2016,123(2): 275-286. DOI: 10.1016/j.ophtha.2015.10.002.
|
[9] |
田芳, 张红, 孙靖, 等. 软性TORIC人工晶状体植入矫正角膜 散光的临床研究. 中华眼科杂志, 2009, 45(9): 814-817. DOI: 10.3760/cma.j.iaan.0412-4081.2009.09.011.
|
[10] |
邢茜, 管怀进, 吴坚, 等. AcrySof Toric人工晶状体矫正白内 障患者术后残留散光的研究. 中华眼视光学与视觉科学杂志, 2011, 13(5): 355-358. DOI: 10.3760/cma.j.issn.1674-845X.2011.05.008.
|
[11] |
李瑾, 赵云娥, 李军花, 等. Acrysof Toric人工晶状体植入矫 正白内障术前角膜散光的短期观察. 中华眼科杂志, 2010, 46(6): 513-517. DOI: 10.3760/cma.j.issn.0412-4081.2010.06.009.[12] Statham M, Apel A, Stephensen D. Comparison of the AcrySof SA60 spherical intraocular lens and the AcrySof Toric SN60T3 intraocular lens outcomes in patients with low amounts of corneal astigmatism. Clin Exp Ophthalmol, 2009, 37(8): 775-779. DOI: 10.1111/j.1442-9071.2009.02154.x.
|
[13] |
Chang DF. Comparative rotational stability of single-piece open-loop acrylic and plate-haptic silicone toric intraocular lenses.J Cataract Refract Surg, 2008, 34(11): 1842-1847. DOI: 10.1016/j.jcrs.2008.07.012.
|
[14] |
Fu YN, Yu XX, Savini G, et al. Assessment of corneal keratometric and astigmatism measurements using verion system and other instruments in cataract patient. Curr Eye Res, 2018, 43(10): 1205-1214. DOI: 10.1080/02713683.2018.1488264.
|
[15] |
Chang M, Kang SY, Kim HM. Which keratometer is most reliable for correcting astigmatism with toric intraocular lenses?Korean J Ophthalmol, 2012, 26(1): 10-14. DOI:10.3341/kjo.2012.26.1.10.
|
[16] |
Hill W. Expected effects of surgically induced astigmatism on AcrySof toric intraocular lens results. J Cataract Refract Surg,2008, 34(3): 364-367. DOI: 10.1016/j.jcrs.2007.10.024.
|
|
|
|