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Characteristics of refraction and misalignment of axis in eyes implanted LENTIS® Comfort Toric intraocular lens Ippei Takasu 1 , Takami Takasu 1 , Kento Kaibara 1 , Noriko Hoshihara 1 1Takasu Eye Clinic pp.1365-1371
Published Date 2022/10/15
DOI https://doi.org/10.11477/mf.1410214525
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Abstract Purpose:To report the characteristics of refraction and misalignment of axis in eyes implanted with LENTIS® Comfort Toric intraocular lens(LCT)(Santen Pharmaceutical Co., Ltd.).

Methods:Forty eyes of 31 cataract patients that showed corneal astigmatism higher than −1.0 diopter(D)were consecutively implanted with LCT from July 2020. None of these eyes showed ocular disorders without any cataract and refractive error observed prior to surgery. There was no intraoperative complication. The LCT was implanted in a capsular bag and its axis was adjusted to a steep meridian in all of the cases according to the corneal astigmatism. One day, one week, and one month postoperatively, refraction was measured using an auto-refractometer(TONOREF®Ⅲ, NIDEK Inc.), and topography(KR-1W®, Topcon Inc.)was performed to determine the axis misalignment. Simultaneously, the uncorrected and corrected visual acuities at 5-meter distant, 1-meter intermediate and 40-centimeter near were measured on the basis of the subjective refractive values. Factors correlated with the axis misalignment were analyzed via Pearson correlation coefficient analysis one week after surgery.

Results:Mean uncorrected visual acuity(VA)and mean corrected VA significantly improved in all ranges from far to near postoperatively(p<0.001, t-test). The refractive values, as measured using the auto-refractometer were as follows:sphere(S)−0.73±0.79D and cylinder(C)−0.70±0.47D, and S−0.21±0.63D and C−0.22±0.45D subjectively 1 week after surgery. There were significant discrepancies with regard to S−0.52D(p<0.01 t-test)and C−0.48D(p<0.001 t-test)between the refractive values obtained using the auto refractometer and the subjective refractive values of the eyes implanted with LCT. The axis misalignment was 8.0±10.8° one week after surgery. The axis misalignment was correlated with residual astigmatism(r=−0.698, p<0.001), uncorrected near VA(r=−0.493, p=0.001), and uncorrected distant VA(r=−0.530, p<0.01)one week postoperatively.

Conclusion:The refractive values measured using the auto refractometer were indicated higher myopic astigmatism than the subjective refractive values in eyes implanted with LCT. The lesser the axis misalignment, the better was the uncorrected VA after surgery.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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