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| Clinical Study of Effect after Implantation of Aspheric Toric vs Aspherical Intraocular Lenses in Patients with Cataract and Corneal Astigmatism |
| Qianlong Bi, Jinyan Qi, Yifeng Zhang, Dongsheng Li, Yu Wang |
| Department of Cataract, Fushun Eye Hospital, Fushun 113006, China |
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Abstract Objective: To compare effect after aspheric toric and aspheric intraocular lens (IOL) implantation in patients with cataract and corneal astigmatism. Methods: Prospective non-randomized controlled studies. One hundred seventy-two eyes of 106 patients with regular corneal astigmatism above1.25 D underwent implantation of an aspheric toric or aspheric intraocular lens in Fushun Eye Hospital from May 2016 to January 2018, including 80 eyes of 50 patients implanted with Acrysof IQ Toric IOLs (SN6AT) (Toric group) and 92 eyes of 56 patients implanted with AcrySof IQ IOLs (SN60WF) (control group). Mean astigmatism was 2.08±0.74 D and 2.14±0.95 D, respectively. Main outcomes of the two groups were evaluated at 6 months, including uncorrected distance visual acuity (UDVA), corrected distance visual acuity (CDVA), spectacle independence for distance vision, residual refractive cylinder, IOL rotation, contrast sensitivity testing,wavefront aberrations, and refractive error-related quality-of-life questionnaire. Postoperative results were analyzed by a t test, Mann-Whitney test, and χ2 test. Results: Nine patients (8.5%) were lost to postoperative follow-up. The mean UDVA of the toric group and control groups was 0.15±0.20 and 0.22±0.14 LogMAR, respectively (t=-2.14, P<0.001), and the mean CDVA was 0.09±0.08 and 0.11±0.09 LogMAR, respectively (t=-0.62, P>0.05). Spectacle independence for distance vision was achieved in 21 patients (77.8%) in the toric group compared with 9 patients (27.3%) in the control group (χ2 =15.15, P<0.001). The mean residual refractive cylinder of toric and control groups was 0.77±0.39 D and 1.99±1.12 D, respectively (t=-7.56, P<0.001). The mean absolute misalignment of the toric group was 4.6±5.7 degrees. The lower-order aberrations of toric group were lower than those of the control group (U=1.57, P=0.006). No significant differences were found in contrast sensitivity or refractive error-related quality of life between the two groups. Conclusions: In patients with cataract and corneal astigmatism, aspheric toric IOL implantation was an effective and safe method to correct corneal astigmatism during cataract surgery, resulting in a nice rotational stability, a higher spectacle independence for distance vision and a lower lower-order aberrations compared with the control IOL implantation group.
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Received: 19 November 2018
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Corresponding Authors:
Jinyan Qi, Department of Cataract, Fushun Eye Hospital, Fushun 113006, China (Email: 990537043@qq.com)
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