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T. Miyai, Y. Yamamoto, R. Nejima, S. Ohtani, T. Samejima, J. Qi, Y. Osakabe, K. Miyata, T. Oshika; Changes in Wavefront Aberration by Limbal Relaxing Incision After Cataract Surgery . Invest. Ophthalmol. Vis. Sci. 2006;47(13):575.
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© ARVO (1962-2015); The Authors (2016-present)
To investigate the changes in wavefront aberration by limbal relaxing incision (LRI) after cataract surgery.
Eighteen eyes of 18 cases after cataract surgery and intraocular lens implantation were included in this study. Their age ranged from 60 to 87 years (75.3±7.2 years), and there were 10 males and 8 females. The patients had astigmatism of 2 diopters (D) or larger, and logMAR uncorrected visual acuity (UCVA) was 0.10 or worse. LRI was performed by a single surgeon (KM). A 550 µm depth incision was created by a diamond knife along the corneal limbus in the steepest meridian. UCVA, best corrected visual acuity (BCVA), mean spherical equivalent (MSE), cylindrical refraction, and wavefront aberration were examined before and 1 month after surgery. Corneal and ocular wavefront aberration was measured with the Hartmann–Schack Wavefront analyzer KR–9000PW (Topcon Inc. Japan).
By LRI, logMAR UCVA improved from 0.388 to 0.079 (p<0.0001). LogMAR BCVA changed from –0.041 to –0.071. MSE showed a hyperopic shift from –0.43±0.62D to 0.04±0.64D (p=0.0019). Refractive astigmatism was reduced from –2.90±1.20D to –0.90±0.92D (p<0.0001). Third order (p=0.0093), fourth order (p<0.0001), and total higher–order (p=0.0030) aberration of the cornea significantly increased. Ocular fourth order (p=0.0038) and total higher–order (p=0.0498) aberration significantly increased by LRI.
LRI after cataract surgery improved astigmatism and UCVA, but both corneal and ocular wavefront aberration significantly increased by surgery.
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