Effect of astigmatism on visual acuity in eyes with a diffractive multifocal intraocular lens
Effect of astigmatism on visual acuity in eyes with a diffractive multifocal intraocular lens
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DOI：
10.1016/j.jcrs.2010.02.016
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发表时间：
2010-08-01
影响因子：
2.8
通讯作者：
Hayashi, Hideyuki
中科院分区：
文献类型：
--
作者：
Hayashi, Ken;Manabe, Shin-ichi;Hayashi, Hideyuki
目得：目的：研究散光对植入衍射型多焦点人工透镜（IOL）的眼在不同距离下视力的影响。在本研究中，眼睛植入了+3.00屈光度（D）增加（add）的衍射多焦点IOL 00 D增加的衍射多焦点IOL（AcrySof ReSTOR SN 6AD 3）或单焦点IOL（AcrySof SN 60 WF）。通过添加不同屈光度（0.00，0.50，1.00，1.50，2.00）的柱面透镜来模拟散光，之后在不同距离处测量远距离矫正视力。在散光为0.00 D和0.50 D时，+4.00 D组的远矫正近视力（DCNVA）和+3.00 D组的远矫正中视力（DCIVA）和DCNVA显著优于单焦点组;矫正远视力（CDVA）相似。在2个多焦点组中，散光为1.00 D的DCNVA更好;然而，在散光为1.50 D和2.00 D的情况下，多焦点组中0.5 m处的CDVA和DCIVA显著差于单焦点组，尽管DCNVA相似。当散光大于1.00D时，多焦点组的平均CDVA和DCNVA达到有用水平（20/40）。结论：衍射型多焦点人工晶状体眼的散光损害了所有远视力，表明需要矫正大于1.00D的散光。
PURPOSE: To examine the effect of astigmatism on visual acuity at various distances in eyes with a diffractive multifocal intraocular lens (IOL).SETTING: Hayashi Eye Hospital, Fukuoka, Japan.METHODS: In this study, eyes had implantation of a diffractive multifocal IOL with a +3.00 diopter (D) addition (add) (AcrySof ReSTOR SN6AD1), a diffractive multifocal IOL with a +4.00 D add (AcrySof ReSTOR SN6AD3), or a monofocal IOL (AcrySof SN60WF). Astigmatism was simulated by adding cylindrical lenses of various diopters (0.00, 0.50, 1.00, 1.50, 2.00), after which distance-corrected acuity was measured at various distances.RESULTS: At most distances, the mean visual acuity in the multifocal IOL groups decreased in proportion to the added astigmatism. With astigmatism of 0.00 D and 0.50 D, distance-corrected near visual acuity (DCNVA) in the +4.00 D group and distance-corrected intermediate visual acuity (DCIVA) and DCNVA in the +3.00 D group were significantly better than in the monofocal group; the corrected distance visual acuity (CDVA) was similar. The DCNVA with astigmatism of 1.00 D was better in 2 multifocal groups; however, with astigmatism of 1.50 D and 2.00 D, the CDVA and DCIVA at 0.5m in the multifocal groups were significantly worse than in the monofocal group, although the DCNVA was similar. With astigmatism of 1.00 D or greater, the mean CDVA and DCNVA in the multifocal groups reached useful levels (20/40).CONCLUSION: The presence of astigmatism in eyes with a diffractive multifocal IOL compromised all distance visual acuities, suggesting the need to correct astigmatism of greater than 1.00 D.