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- W80001557 abstract "Although several nomograms are available for the incisional keratotomy to correct naturally occurring astigmatism, astigmatic keratotomy in eyes after cataract surgery has not been well analyzed. The predictability and effectiveness of arcuate keratotomy in pseudophakic eyes were studied.A prospective, multicenter study.One hundred four eyes of 86 patients with residual corneal astigmatism of 1.5 diopters (D) or more after cataract surgery were examined.Arcuate keratotomy was performed in nine centers by nine surgeons.The amount of astigmatic correction was calculated using the vector analysis of preoperative and 6-month postoperative refractive cylinder results.Multiple regression analysis showed that optical zone size, number of incisions, and incision length had significant correlations with the amount of astigmatic correction. The regression equation was expressed as effects = (-0.643 x optical zone size) + (0.998 x incision number) + (0.057 x incision length) + 2.356. The parameter of predictability (r2: 35%) was lower than that reported for congenital astigmatism (48 to approximately 56%). A new nomogram was derived based on the multiple regression equation.Astigmatic keratotomy in pseudophakic eyes is less predictable than that in eyes with idiopathic astigmatism, but the procedure is sufficiently effective in reducing the residual astigmatism after cataract surgery. Individual nomograms are necessary for astigmatic keratotomy in eyes with naturally occurring and postsurgical astigmatism." @default.
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- W80001557 date "1998-11-01" @default.
- W80001557 modified "2023-10-02" @default.
- W80001557 title "Arcuate keratotomy to treat corneal astigmatism after cataract surgery" @default.
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- W80001557 doi "https://doi.org/10.1016/s0161-6420(98)91117-4" @default.
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