ArticleInternational journal of ophthalmology2025
Alpha and Kappa angle on postoperative visual quality in cataract surgery.
Article in International journal of ophthalmology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Comparative analysis of preoperative and postoperative changes in photopic and mesopic angle kappa and angle alpha in cataract surgery.BMC ophthalmology · 2026Article
- Angle Kappa in Patients with Cataracts and High Myopia.Ophthalmology and therapy · 2026Article
- Exploring the interplay between chord α and chord μ, pyramidal wavefront aberrometry, and ocular biometric indices in preoperative refractive surgery candidates.International ophthalmology · 2025Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
aimTo explore the effect of Alpha angle and Kappa angle before multifocal intraocular lenses (MIOLs) implantation on postoperative visual quality of patients.
methodsBefore and 3mo after cataract surgery, Alpha angle and Kappa angle were collected using IOL Master 700, iTrace, and Pentacam for clinical observation. Postoperative visual quality indicators, including high-order aberrations (HOA), modulation transfer function (MTF) and point spread function (PSF), were collected using iTrace. multiple linear regression analysis was used to analyze the correlation of the Kappa angle and the Alpha angle with age, axial length (AL), anterior chamber depth (ACD), keratometry (K), lens thickness (LT) and corneal white to white distance (WTW). Pearson correlation coefficient was used to analyze the correlation between Alpha angle and Kappa angle; Bland Altman analysis was used to evaluate the consistency of pairwise detection results of three instruments.
resultsThe Alpha angle was modeled as Alpha=2.230+0.003×age-0.036×AL-0.025×K-0.058×WTW and the Kappa angle was modeled as Kappa=0.685+ 0.003×age-0.013×K-0.061×WTW. The correlation between the total Alpha angle and Kappa angle of the three instruments was weakly positive (
conclusionThe patients with older age, flatter K and shorter WTW should be alert to the possibility of larger Alpha angle and Kappa angle. Alpha angle should also consider the factor of AL. When selecting patients with MIOLs implantation, there is no need to consider the Alpha angle. Careful consideration should be given to the Kappa angle, and the preoperative standard of <0.5 mm can refer to △Kappa=1.136-0.021×AL-0.013×K and be appropriately relaxed.
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