The stepwise multiple regression analysis revealed that corneal regular astigmatism pattern significantly influenced the amount of corneal irregular astigmatism after controlling for confounding factors (<0.001). Corneal irregular astigmatism, such as asymmetry and higher order irregularity components, was the ...
(a) Regular astigmatism: Normal—SyntEyes 0 and 12 months; (b) irregular astigmatism and HOAs: SyntEyes with simulated progression of 24 and 36 months (mid-stage KC); (c) irregular astigmatism and higher amount of HOAs: SyntEyes with simulated progression of 48, 60 and 120 months (late-...
The amount of against-the-wound astigmatism and absolute value of length of the induced vector did not differ significantly between groups ( P > 0.05, paired t test). In both groups, irregular astigmatism 1 day after surgery was significantly greater than the preoperative levels ( P 0.05). ...
Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism.doi:10.1038/S41598-021-95358-ZYuta UenoRisa NomuraTakahiro HiraokaKatsuhito KinoshitaMutsuko OharaTetsuro OshikaSpringer Science and Business Media LLC
Corneal regular and irregular astigmatism assessed by fourier analysis of videokeratography data in nor- mal and pathologic eyes. Ophthalmology 2004;111:752-757.Tanabe T, Tomidokoro A, Samejima T, et al. Corneal regular and irregular astigmatism assessed by Fourier analysis of videokeratography ...
Much can still be achieved by non-toric lens, both for a wide range of astigmatism and for ease of supply. A number of these alternatives are examined, their advantages and disadvantages reappraised, and the merits of lens correction compared with surgical methods considered....
Tanabe T, Tomidokoro A, Samejima T, et al. Corneal regular and irregular astigmatism assessed by fourier analysis of videokeratography data in nor- mal and pathologic eyes. Ophthalmology 2004;111:752-757.Tanabe T, Tomidokoro A, Samejima T, et al. Corneal regular and irregular astigmatism ...
AstigmatismOptics and PhotonicsAlthough toric contact lenses have improved in design and development and their use is increasing, further consideration should be given to the alternative methods of astigmatism correction by contact lenses. Much can still be achieved by non-toric lens, both for a wide...
(Pearson r=0.44, p=0.0004)and 6-mm (r=0.65, p<0.0001) pupils, but not with regularastigmatism (r=0.15, p=0.2705) (r=0.14, p=0.2860).Even in patients who acquired good uncorrected visual acuityby means of orthokeratology, asymmetry as one of the irregularastigmat...
Irregular corneal astigmatism in keratoconus or scleral-buckle-induced regular astigmatisms can be equally well corrected with the use of toric IOL during cataract surgery. Previous scleral buckling or pars plana vitrectomy seem to have no impact on the success of the toric IOL implantation, even ...