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Yoshiaki Kiuchi, Yoshitaka Nakao, Noriko Ihara, Shunsuke Nakakura, Ryo Asaoka, Makoto Aihara; Effect of cataract surgery on the biomechanical property of the cornea. Invest. Ophthalmol. Vis. Sci. 2016;57(12):2394.
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© ARVO (1962-2015); The Authors (2016-present)
Cataract surgery may change the ocular biomechanical property. Corneal visualization scheimpflug technology (Corvis ST Tonometry: CST) provides several parameters that represent the corneal biomechanical property. The purpose of our study was to investigate the effect of phacoemulsification and intraocular lens implantation on the CST parameters.
Data from 59 normal eyes of 59 subjects (mean age=74.0 years old) were prospectively acquired at Tsukazaki Hospital and Hiroshima University Hospital between February 2014 and December 2014. The intraocular pressure (IOP) with Goldmann applanation tonometry (IOP-G), central corneal thickness, axial length, corneal curvature, and CST parameters were measured before and one week, one month and 3 months after cataract surgery. Measurements with CST and IOP-G were carried out three times per patient and the averages of all three measurements were used in statistical analyses (linear mixed effect model).
IOP-G significantly decreased from 15.2±4.3 mmHg to 11.8±3.1 mmHg at 3 months after cataract surgery (p<0.05). The maximum deformation amplitude and peak distance increased significantly. The changes after cataract surgery of A1 time, A2 time, A1 length and A2 length were not significant. Although in normal subjects A2 velocity decreases with IOP reduction (Asaoka, PLOS ONE 2015), A2 velocity in our subjects increased significantly after cataract surgery (p<0.05).
The corneal biomechanical property might be changed by cataract surgery.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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