Evaluation of posterior and total corneal astigmatism with colour-LED topography.

Eye
João MendesTiago B Ferreira

Abstract

To characterise the posterior and total corneal astigmatism using colour point-source light-emitting diodes (LED) topography. In a prospective case series 400 eyes from 400 patients were evaluated by colour-LED topography. Only eyes with normal topographies were considered. The following parameters were studied: magnitude and distribution of SimK and posterior corneal astigmatism, correlation between SimK and posterior corneal astigmatism, and differences in magnitude and axis between total and anterior corneal astigmatism. The mean SimK corneal astigmatism was 1.21 ± 0.94 D. The mean posterior corneal astigmatism was 0.37 ± 0.24 D. Posterior astigmatism was vertically oriented in 68% of eyes. Twenty-two percent of eyes showed a posterior corneal astigmatism ≥ 0.50 D. The correlation coefficients between SimK and posterior corneal astigmatism were: r2 = 0.066; p = 0.371 in WTR eyes, r2 = 0.112; p = 0.173 in ATR eyes and r2 = -0.019; p = 0.879 in oblique eyes. A difference between SimK and total corneal astigmatism ≥ 0.50 D was found in 7% of eyes. A difference in axis between SimK and total corneal astigmatism ≥ 10° was found in 24% of eyes. The percentage of eyes with posterior corneal astigmatism ≥ 0.50 D and the differences ...Continue Reading

References

Sep 1, 1980·American Journal of Ophthalmology·K J Hoffer
Sep 1, 1994·Journal of Cataract and Refractive Surgery·K ShimizuY Suzuki
Feb 13, 2001·Journal of Cataract and Refractive Surgery·J T HolladayG M Kezirian
Apr 20, 2001·Journal of Cataract and Refractive Surgery·J NémethB Csákány
Feb 24, 2009·American Journal of Ophthalmology·Jau-Der HoShiow-Wen Liou
Sep 22, 2012·Journal of Cataract and Refractive Surgery·Jaime AramberriItxaso Vigara
Oct 17, 2012·Journal of Cataract and Refractive Surgery·Douglas D KochLi Wang
Mar 1, 2013·Journal of Refractive Surgery·Filomena RibeiroJoao Mendanha Dias
Oct 31, 2013·Journal of Cataract and Refractive Surgery·Douglas D KochLi Wang
Nov 30, 2013·Journal of Cataract and Refractive Surgery·Thomas Kohnen
Dec 21, 2013·Journal of Cataract and Refractive Surgery·Eloy A VillegasPablo Artal
Jul 21, 2014·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Youngsub EomJong Suk Song
Aug 28, 2014·Cornea·Gabor NemethLaszlo Modis
Sep 2, 2014·Journal of Cataract and Refractive Surgery·Giacomo SaviniKristian Næser
Sep 27, 2014·Current Eye Research·Paul-Rolf PreussnerJochen Wahl
Dec 4, 2014·Investigative Ophthalmology & Visual Science·Bastian TonnThomas Kohnen
Dec 24, 2014·Journal of Cataract and Refractive Surgery·Lijun ZhangD Rex Hamilton
Jan 15, 2015·Investigative Ophthalmology & Visual Science·Giacomo Savini, Kristian Næser
Mar 15, 2015·Ophthalmology·Yuta UenoTetsuro Oshika
Aug 31, 2016·Clinical Ophthalmology·Tiago B Ferreira, Filomena J Ribeiro
Nov 15, 2016·Journal of Cataract and Refractive Surgery·Yoshihiko NinomiyaTetsuro Oshika
Apr 16, 2017·Journal of Cataract and Refractive Surgery·Tiago B FerreiraJoão G O'Neill
May 4, 2017·Cornea·Kristian NæserJesper Flethøj Bregnhøj
Oct 6, 2017·PloS One·Tiago B FerreiraJoão G O'Neill
Oct 11, 2017·Journal of Cataract and Refractive Surgery·Giacomo SaviniPietro Ducoli
Jan 18, 2018·Clinical Ophthalmology·Tiago B Ferreira, Filomena J Ribeiro
May 9, 2018·Journal of Refractive Surgery·Benjamin R LaHood, Michael Goggin
Aug 23, 2019·European Journal of Ophthalmology·David P PiñeroMaría Teresa Caballero

❮ 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.