ArticleFrontiers in medicine2021
A Multicenter Study of the Distribution Pattern of Posterior-To-Anterior Corneal Curvature Radii Ratio in Chinese Myopic Patients.
Article in Frontiers in medicine, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Review
- Updated study on demographic and ocular biometric characteristics of cataract patients indicates new trends in cataract surgery.Scientific reports · 2025Article
- Correlations of anterior and posterior corneal parameters in Chinese myopic patients: a retrospective multicenter study.Quantitative imaging in medicine and surgery · 2025Article
- Associations between corneal curvature and other anterior segment biometrics in young myopic adults.Scientific reports · 2024Article
- Ocular biometrics in eyes with different white-to-white corneal diameter in young myopic adults.Scientific reports · 2024Article
- Prediction of Posterior-to-Anterior Corneal Curvature Radii Ratio in Myopic Patients after LASIK, SMILE, and PRK Using Multivariate Regression Analysis.Journal of clinical medicine · 2023Article
- Comparison of Barrett and Kane keratoconic formulae in eyes with only posterior corneal changes.Saudi journal of ophthalmology : official journal of the Saudi Ophthalmological SocietyArticle
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Abstract
Estimation of corneal refractive power (CRP) is of crucial importance to refractive and cataract surgery. The ratio of posterior to anterior curvature radii of the cornea (P/A ratio) is one of the key factors to determine the actual CRP (True-K). While the traditional method to calculate the CRP (Sim-K) is based on a constant P/A ratio (0.82), it is suggested that the P/A ratio varies in different people and exhibits a distribution pattern, which may have an impact on the accuracy of CRP estimation and postoperative refractive outcome. In this multicenter study, we aimed to investigate the distribution pattern of the P/A ratio in a large number of myopic patients, and further explore the relationship between P/A ratio and ΔK (the difference between True-K and Sim-K). We found that distribution of the P/A ratio ranged from 0.72 to 0.86 with an average value of 0.82 ± 0.01. The compensation effect of the refractive power of the posterior on the anterior surface of the cornea decreased with the increase of P/A ratio. There was a significant correlation between P/A ratio and ΔK in all eyes (
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