Corneal topographic astigmatism (CorT) to quantify total corneal astigmatism

Journal of Refractive Surgery
Noel AlpinsGeorge Stamatelatos

Abstract

To evaluate the performance of corneal topographic astigmatism (CorT) based on total corneal power measurements. Anterior, posterior, and total corneal power measurements of 526 virgin eyes obtained using the CSO Sirius tomographer (Costuzione Strumenti Oftalmici, Scandicci, Florence, Italy) were analyzed. Individual CorTs were created from each set of data. These CorTs were assessed using ocular residual astigmatism (ORA), which quantifies corneo-refractive differences. A low standard deviation of the ocular residual astigmatism (ORAsd) indicates a low variability between corneal astigmatism and refractive cylinder. A low mean of the ORA magnitude indicates a close correlation of refractive cylinder and corneal astigmatism. The CorT based on total corneal power measurements had an ORAsd of 0.30 diopters (D) and a mean ORA magnitude of 0.53 D. The CorT candidates based on anterior corneal power measurements all had an ORAsd of at least 0.32 D, and the mean ORA magnitudes were all 0.64 D or greater. Both the ORAsd and mean ORA magnitude of the CorT based on total corneal power measurements were significantly less than those of the CorT based on anterior corneal power measurements (both P < .001, as estimated via bootstrapping). ...Continue Reading

References

Jan 1, 1997·Journal of Cataract and Refractive Surgery·N A Alpins
Jan 10, 1998·Journal of Cataract and Refractive Surgery·V YaylaliH W Thompson
Jan 10, 1998·Journal of Cataract and Refractive Surgery·J T Holladay
Nov 9, 2005·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Birgit LacknerChristian Skorpik
Sep 28, 2010·Journal of Cataract and Refractive Surgery·Lance KuglerMing X Wang
Sep 28, 2010·Journal of Cataract and Refractive Surgery·Michael GogginAdrian Esterman
Nov 13, 2010·Investigative Ophthalmology & Visual Science·Li WangCynthia J Roberts
Jul 12, 2011·Journal of Refractive Surgery·Yi-Shan QianMatthew R Hoffman
Sep 27, 2012·Journal of Cataract and Refractive Surgery·Noel AlpinsGeorge Stamatelatos
Oct 11, 2012·PloS One·Maria VinasSusana Marcos
Oct 17, 2012·Journal of Cataract and Refractive Surgery·Douglas D KochLi Wang
Oct 31, 2013·Journal of Cataract and Refractive Surgery·Douglas D KochLi Wang
Dec 18, 2013·Journal of Cataract and Refractive Surgery·Andreas FringsStephan J Linke
May 8, 2014·Journal of Refractive Surgery·Jorge L Alió, Noel Alpins

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Citations

Jun 6, 2015·Journal of Refractive Surgery·Virgilio GalvisM Margarita Parra
May 1, 2016·American Journal of Ophthalmology·Giuliano de Oliveira FreitasMilton Ruiz Alve
Apr 14, 2017·Journal of Refractive Surgery·Dan Z ReinsteinJ Bradley Randleman
May 24, 2017·Journal of Cataract and Refractive Surgery·Dan Z ReinsteinJ Bradley Randleman
May 24, 2017·Journal of Cataract and Refractive Surgery·Jonathan D Solomon, John Ladas
Jun 8, 2017·International Ophthalmology Clinics·Rishabh C Date, Zaina N Al-Mohtaseb
Aug 21, 2020·Journal of Cataract and Refractive Surgery·Neal KansaraSeth M Pantanelli
Aug 23, 2020·Journal of Cataract and Refractive Surgery·Tanner J FergusonJ Bradley Randleman

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