Results 81 to 90 of about 828,745 (178)

Estimation of final cylindrical spectacle correction by Pentacam

Function and Disability Journal, 2020
Background and Objectives: Keratoconus is a non-inflammatory asymmetric corneal degenerative disease characterized by the steepening and distortion of the cornea. In this disease, irregular astigmatism makes the subjective refraction difficult. Using the
Ali Mirzajani, Ramin Salouti, Ebrahim Jafarzadehpur , Raziye Dayyani   +3 more
doaj   +1 more source

Advances in the genetics of refractive errors: Contributions from the CREAM consortium

Acta Ophthalmologica, Volume 104, Issue 3, Page e222-e231, May 2026.
Abstract The Consortium for Refractive Error and Myopia (CREAM) was established in 2011, bringing together an international team of researchers studying more than 30 cohorts. Since its establishment, CREAM has played a pivotal role in research investigating the genetics of myopia and other refractive errors, serving as a key driver of progress in the ...
Sze Wai Rosa Li, Xi He, Louise Terry, Virginie J. M. Verhoeven, Samantha Sze‐Yee Lee, Gareth Lingham, Jeremy A. Guggenheim, David A. Mackey, Seang‐Mei Saw, Caroline C. W. Klaver, Chi Pui Pang, CREAM Consortium   +11 more
wiley   +1 more source

1 year posterior corneal changes after Bowman Layer Transplant for keratoconus.

, 2021
Introduction: To report the posterior corneal changes after Bowman Layer Transplant for keratoconus in a tertiary hospital in the UK.Methods: 5 eyes of 5 patients receiving Bowman Layer Transplant for advanced keratoconus in Royal Gwent Hospital (Newport,
Alio, Jorge, Lyons, Conor, Konstantopoulos, Aristides, Tourkmani, Abdo Karim, Hossain, Parwez, Anderson, David F., Jorge L. Alio, Aristides Konstantopoulos, Parwez N. Hossain, David F. Anderson, Abdo Karim Tourkmani, Conor Lyons   +11 more
core   +1 more source

Agreement between total corneal astigmatism calculated by vector summation and total corneal astigmatism measured by ray tracing using Galilei double Scheimpflug analyzer

Journal of Optometry, 2018
Purpose: To evaluate the agreement between total corneal astigmatism calculated by vector summation of anterior and posterior corneal astigmatism (TCAVec) and total corneal astigmatism measured by ray tracing (TCARay).
Sepehr Feizi, Siamak Delfazayebaher, Vahid Ownagh, Fatemeh Sadeghpour   +3 more
doaj   +1 more source

Posterior corneal elevation changes after small incision lenticule extraction in patients with thin cornea [PDF]

International Journal of Ophthalmology
AIM: To investigate the changes in posterior corneal elevation within 6mo after small incision lenticule extraction (SMILE) surgery for myopia and myopic astigmatism in patients with thin corneas.
Jian-Min Shang, Yin Liu, Bo Zeng, Jia Huang, Xing-Tao Zhou   +4 more
doaj   +1 more source

Refractive outcomes of toric intra-ocular lens implantation in cases of high posterior corneal astigmatism. [PDF]

Indian J Ophthalmol, 2023
Jin T, Yu L, Li J, Zhou Y.
europepmc   +1 more source

Posterior corneal astigmatism modifications after cataract surgery and its role on total corneal astigmatism

Annals of Eye Science, 2018
Background: In recent years posterior corneal astigmatism and its effect on total corneal astigmatism has been studied, with research showing that this can impact total astigmatism. This study aims to ascertain if there is significant change in the posterior corneal astigmatism after cataract surgery and its impact on the total astigmatism.
Diana Silva, Mafalda Mota, Catarina Pedrosa, Peter Pêgo, Sara Pinto, Cristina Vendrell, Isabel Prieto   +6 more
openaire   +1 more source

The Relation Between Corneal and Total Astigmatism [PDF]

, 1996
Using computer-assisted videokeratoscopy we measured corneal astigmatism and compared these results over a range of corneal zone diameters with total ocular astigmatism derived by subjective refraction.
Van Saarloos, Paul P., Keller, Peter R., Carney, Leo G., Davis, Brett A., Collins, Michael J.   +4 more
core  

Effect of steep-axis incisions on anterior and posterior corneal astigmatism and higher-order aberrations after cataract surgery

Frontiers in Medicine
PurposeTo compare the effects of steep-axis versus superior corneal incisions on visual acuity, astigmatism correction, and higher-order aberrations (HOAs) in patients undergoing phacoemulsification with intraocular lens implantation.DesignProspective ...
Kaiyue Du, Kaiyue Du, Zhan Shen, Zhan Shen, Bowei Yuan, Bowei Yuan, Yinan Liu, Yinan Liu, Xiaoyong Chen, Xiaoyong Chen, Jing Hong, Jing Hong   +11 more
doaj   +1 more source

The contribution of posterior corneal astigmatism to ocular residual astigmatism

Abstract Objectives To determine the main sources of ocular residual astigmatism (ORA) and the contribution of posterior corneal astigmatism (PCA) to ORA. Methods This cross-sectional study was conducted on 177 right eyes of 177 patients. Anterior corneal astigmatism (ACA) and PCA were obtained from Pentacam.
Dongmei Yan, Jian Lin, Dexiang An, Haiqian Wu, Yun Lu   +4 more
openaire   +1 more source