Repeatability and inter-device agreement for three different methods of keratometry: Placido, Scheimpflug, and color LED corneal topography

Journal of Refractive Surgery
Irene Ruiz HidalgoMarie-José Tassignon

Abstract

To determine the repeatability of a color LED corneal topographer (Cassini; iOptics, The Hague, The Netherlands) and compare it with Placido and Scheimpflug based devices (EyeSys 2000; EyeSys Laboratories, Houston, TX, and Pentacam HR; Oculus Optikgeräte GmbH, Wetzlar, Germany). This prospective study involved 20 healthy volunteers (20 eyes) recruited from the staff of the Antwerp University Hospital. For each eye, three measurements were taken using each device, from which eight parameters describing keratometry and astigmatism were derived. Repeatability was assessed using intrasession, within-subject analysis of variance. Agreement was evaluated between pairs of devices with Bland- Altman plots and 95% confidence intervals. The repeatability values were good for all three devices, although slightly worse for the Cassini than for the other two devices for steep, flat, and mean keratometry. The EyeSys showed worse repeatability for the astigmatism axis. EyeSys and Pentacam agreed well with each other in terms of mean keratometry, whereas the Cassini gave consistently higher values by 0.52 diopters (D) when compared with the EyeSys (P < .05, paired t test) and by 0.38 D when compared with the Pentacam (P < .05, paired t test). ...Continue Reading

References

Jan 1, 1990·Journal of Cataract and Refractive Surgery·J R McEwanS D Friedel
Jun 1, 1997·Optometry and Vision Science : Official Publication of the American Academy of Optometry·L N ThibosD Horner
Sep 1, 1962·Journal of Abnormal and Social Psychology·J COHEN
Dec 20, 2007·Current Opinion in Ophthalmology·Alexander C LeeJay S Pepose
Jan 1, 2008·Journal of Cataract and Refractive Surgery·Hema ShankarKonrad Pesudovs
Nov 6, 2008·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Davie Chen, Andrew K C Lam
May 26, 2009·Journal of Cataract and Refractive Surgery·Scott A ReadBrett A Davis
Jul 17, 2009·Journal of Refractive Surgery·Giacomo SaviniKenneth J Hoffer
Aug 20, 2010·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Cristina M OliveiraSandra Franco
Oct 15, 2010·Arquivos brasileiros de oftalmologia·Vinícius Silbiger de StefanoPaulo Schor
Aug 4, 2011·Investigative Ophthalmology & Visual Science·Colm McAlindenKonrad Pesudovs
Aug 23, 2011·Journal of Cataract and Refractive Surgery·Giacomo SaviniKenneth J Hoffer
Jul 19, 2013·Journal of Cataract and Refractive Surgery·Xinjie MaoJinhai Huang
Dec 19, 2013·Case Reports in Ophthalmology·Anastasios John Kanellopoulos, George Asimellis
Feb 25, 2014·International Ophthalmology·Shiva MehravaranHassan Hashemi

❮ Previous
Next ❯

Citations

Jul 21, 2015·Journal of Cataract and Refractive Surgery·Frederik Raiskup, Eberhard Spoerl
Jun 4, 2016·Journal of Cataract and Refractive Surgery·Teissy OsakiMauro Campos
Jul 5, 2016·Journal of Cataract and Refractive Surgery·Michael SchultzOmid Kermani
Dec 7, 2017·Indian Journal of Ophthalmology·Manpreet KaurJeewan S Titiyal
Oct 9, 2018·Journal of Refractive Surgery·Vasilios F DiakonisRobert J Weinstock
Sep 5, 2019·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·David P PiñeroMaría Teresa Caballero
May 19, 2018·Journal of Cataract and Refractive Surgery·Vinicius S De StefanoWilliam J Dupps
Nov 27, 2019·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Ainhoa Molina-MartínVicent J Camps
Nov 2, 2017·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Clara Ruiz-BeldaDavid P Piñero
Aug 23, 2019·European Journal of Ophthalmology·David P PiñeroMaría Teresa Caballero
Jul 28, 2021·International Ophthalmology·Bradley P O'NeillRobert J Weinstock
Aug 28, 2021·Diagnostics·Piotr KanclerzXiaogang Wang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.