Corneal refractive power and eccentricity in the 40- to 64-year-old population of Shahroud, Iran

Cornea
Soheila AsgariAkbar Fotouhi

Abstract

To determine the normal corneal curvature, power, and eccentricity in an Iranian population and their determinants. This report is part of a population-based study conducted in 2009. Of the 5190 participants of the study, Pentacam data from 8532 eyes of 4266 people who met the inclusion criteria for this analysis were used. For each eye, we extracted minimum and maximum keratometry readings, the average of the 2 readings (mean-K), the difference between these 2 parameters (keratometric astigmatism), and corneal eccentricity. The average mean-K, keratometric astigmatism, and eccentricity were 43.73 ± 2.47, 0.90 ± 0.93, and 0.27 ± 0.63 diopter, respectively. Mean-K was directly correlated with age; inversely correlated with body mass index, axial length, white-to-white corneal diameter, and anterior chamber depth; increased at higher amounts of myopia; and was higher in women compared with men. Keratometric astigmatism was significantly higher in women, increased at higher amount of refractive error, but showed no association with other variables. Eccentricity was correlated indirectly with age and white-to-white corneal diameter, and directly with axial length. It increased with myopia. Compared with other studies, the mean corn...Continue Reading

References

Feb 1, 1995·Optometry and Vision Science : Official Publication of the American Academy of Optometry·C S Ooi, T Grosvenor
Jun 23, 1998·Advances in Experimental Medicine and Biology·L A WickhamD A Sullivan
Jun 25, 1999·The British Journal of Ophthalmology·Z LiuS C Pflugfelder
Apr 18, 2000·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·W A DouthwaiteH Notay
Oct 23, 2002·Acta Ophthalmologica Scandinavica. Supplement·L Bonomi
Aug 23, 2005·Ophthalmology·Liang XuJost B Jonas
Jul 26, 2006·Journal of Cataract and Refractive Surgery·Han-Bor Fam, Kooi-Ling Lim
Nov 4, 2006·Journal of Cataract and Refractive Surgery·Kooi-Ling Lim, Han-Bor Fam
Apr 3, 2007·Journal of Cataract and Refractive Surgery·Han-Bor Fam, Kooi-Ling Lim
May 2, 2007·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·J JorgeM A Parafita
Jan 14, 2009·Archives of Ophthalmology·Kristine E LeeTien Yin Wong
Feb 25, 2009·Indian Journal of Ophthalmology·Rohit ShettyBhujang K Shetty
Mar 3, 2009·Experimental Eye Research·Ankush PrasharJeremy A Guggenheim
Mar 21, 2009·Journal of the Chinese Medical Association : JCMA·Mei-Ju ChenShu-Mei Lee
Feb 5, 2010·Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie·Hassan HashemiFarhad Rezvan
Jan 6, 2011·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Mehdi KhabazKhoobAkbar Fotouhi

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Citations

May 3, 2014·Middle East African Journal of Ophthalmology·Hassan HashemiMehdi Khabazkhoob
Nov 6, 2014·Middle East African Journal of Ophthalmology·Mohammad MiraftabSoheila Asgari
Aug 21, 2014·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Hassan HashemiAkbar Fotouhi
Jun 9, 2016·BMC Ophthalmology·Maria Teresa ZocherUNKNOWN EVICR.net
Jul 11, 2018·Journal of Current Ophthalmology·Samira HeydarianMehdi Khabazkhoob
Mar 23, 2018·Journal of Current Ophthalmology·Mohammad MiraftabSoheila Asgari
Mar 11, 2021·Seminars in Ophthalmology·Hassan HashemiAkbar Fotouhi

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