Corneal thickness profile and posterior corneal astigmatism in normal corneas

Ophthalmology
Yuta UenoTetsuro Oshika

Abstract

To analyze the influence of corneal thickness profile on posterior corneal astigmatism (PA). Prospective, observational study. We included 418 normal subjects (213 men and 205 women) ranging in age from 6 to 93 years (49.0 ± 23.4 years, mean ± standard deviation) in this study. Anterior and posterior corneal topography were evaluated using 3-dimensional anterior segment optical coherence tomography. Pericentral corneal thickness (PCT) in each quadrant (superior, inferior, nasal, and temporal) was measured, and average PCT in the vertical (superior + inferior) and horizontal (nasal + temporal) directions was calculated. Posterior corneal astigmatism was calculated as (1) assumed PA based on the anterior corneal curvature measurement and the keratometric index and (2) actual PA derived from the direct measurement of posterior corneal curvature. Corneal thickness distribution and the difference between assumed and actual PA. The PCT was significantly greater in the vertical (546.0 ± 31.8 μm) than in the horizontal direction (542.6 ± 31.7 μm) (P < 0.0001), and the difference between them was significantly correlated with subject age (r = 0.518, P < 0.0001). The difference between assumed and actual PA significantly correlated with ...Continue Reading

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Citations

May 27, 2015·Ophthalmology·Douglas D Koch
Jul 29, 2015·American Journal of Ophthalmology·Youngsub EomHyo Myung Kim
Oct 27, 2015·Ophthalmology·Yuta UenoTetsuro Oshika
Nov 1, 2017·International Ophthalmology·Emilia CanteraAlessandra Micera
Oct 11, 2017·Journal of Cataract and Refractive Surgery·Giacomo SaviniPietro Ducoli
Oct 7, 2017·PloS One·Takenori InomataReza Dana
Nov 15, 2016·Journal of Cataract and Refractive Surgery·Yoshihiko NinomiyaTetsuro Oshika
Oct 11, 2017·Journal of Refractive Surgery·Xu ShaoA-Yong Yu
Mar 16, 2017·International Ophthalmology·Sepehr FeiziFatemeh Sadeghpour
Aug 31, 2019·American Journal of Ophthalmology·Janelle TongBarbara Zangerl
Jun 3, 2021·Scientific Reports·Yuanfeng JiangFang Tian

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