Results 141 to 150 of about 12,156 (169)

[The analysis of the axises of corneal astigmatism and total astigmatism in astigmatic patients].

Yan ke xue bao = Eye science, 2004
The axial amount and the relationship between the axises of corneal astigmatism and total astigmatism were statistically analyzed in ametropic patients, for the purpose of selecting the refractive correction, the base curve of contact lens, the axis of astigmatic contact lens, and providing the reference of operational amount of ecimer laser ...
Z, Dai, R, Yu, X, Gong, S, Wang
openaire   +1 more source

Age-Related Changes in Anterior, Posterior, and Total Corneal Astigmatism

Journal of Refractive Surgery, 2014
PURPOSE: To evaluate age-related changes in anterior, posterior, and total corneal astigmatism by comparing simulated keratometric astigmatism to total corneal astigmatism. METHODS: Corneal topography of the anterior and posterior surfaces was evaluated using three-dimensional ...
Yuta, Ueno, Takahiro, Hiraoka, Simone, Beheregaray, Maki, Miyazaki, Mutsuko, Ito, Tetsuro, Oshika   +5 more
openaire   +2 more sources

Prevalence data for total corneal astigmatism in cataract patients

Graefe's Archive for Clinical and Experimental Ophthalmology
To report the prevalence data for total corneal astigmatism (TCA) in cataract patients.The authors retrospectively collected and analyzed the preoperative biometric data of the patients who underwent cataract surgery in the Department of Ophthalmology, Peking University Third Hospital, from January 2019 to May 2023.The mean age of the 10817 patients ...
Linbo Bian, Baikai Ma, Zhengze Sun, Wenlong Li, Yiyun Liu, Rui Qin, Jiawei Chen, Yunke Ma, Lu Zhao, Hong Qi   +9 more
openaire   +2 more sources

Optimized keratometry and total corneal astigmatism for toric intraocular lens calculation

Journal of Cataract and Refractive Surgery, 2017
To compare keratometric astigmatism (KA) and different modalities of measuring total corneal astigmatism (TCA) for toric intraocular lens (IOL) calculation and optimize corneal measurements to eliminate the residual refractive astigmatism.G.B. Bietti Foundation IRCCS, Rome, Italy.Prospective case series.Patients who had a toric IOL were enrolled ...
Giacomo, Savini, Kristian, Næser, Domenico, Schiano-Lomoriello, Pietro, Ducoli   +3 more
openaire   +2 more sources

[The relations of corneal, lenticular and total astigmatism].

Yan ke xue bao = Eye science, 1997
To determine the relations of corneal, lenticular and total astigmatism and the changes of the astigmatism with age.Out-patients with refractive errors were refracted with retinoscope after using cycloplegic drops and measured the radii of anterior corneal curvature.One hundred and ninety-four cases (382 eyes) with refractive errors were studied.
D, Liang, Z, Guan, J, Lin
openaire   +1 more source

Assessment of Anterior, Posterior, and Total Central Corneal Astigmatism in Eyes With Keratoconus

American Journal of Ophthalmology, 2015
To investigate the magnitudes and the axis orientations of anterior, posterior, and total central corneal astigmatism in eyes with keratoconus.Retrospective case series.This study comprised 137 eyes of 137 keratoconic patients (97 men and 40 women; mean age ± standard deviation, 36.9 ± 12.2 years). The magnitude and the axis orientation of each corneal
Kazutaka, Kamiya, Kimiya, Shimizu, Akihito, Igarashi, Toshiyuki, Miyake   +3 more
openaire   +2 more sources

Total Corneal Astigmatism and Posterior Corneal Surface

Journal of Refractive Surgery, 2015
Virgilio, Galvis, Alejandro, Tello, Camilo A, Niño, M Margarita, Parra   +3 more
openaire   +4 more sources

Faculty Opinions recommendation of Contribution of posterior corneal astigmatism to total corneal astigmatism.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature, 2013
George O Waring IV, Theodore Pasquali, Jason Philip Brinton   +2 more
  +4 more sources

Effects of Superficial Keratectomy in Peripheral Hypertrophic Subepithelial Corneal Opacification on Front and Back Corneal Astigmatism

Current Eye Research, 2021
Adrian Gericke, Alexander K Schuster, Joanna Wasielica-Poslednik   +2 more
exaly  

Faculty Opinions recommendation of Contribution of posterior corneal astigmatism to total corneal astigmatism.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature, 2012
Kevin M Miller, Katherine L Bergwerk
openaire   +1 more source