Intereye Asymmetry in Eyes With Keratoconus and High Ammetropia: Scheimpflug Imaging Analysis

Cornea
Maria A HenriquezMichael W Belin

Abstract

To evaluate intereye asymmetry using several parameters obtained from Scheimpflug imaging to discriminate between normal eyes, high-ammetropic eyes with very early keratoconus (VEKC), and keratoconus eyes in all stages. This prospective comparative study includes 685 patients (1370 eyes), of which 294 patients had bilateral keratoconus, 50 patients had high ammetropia, and 341 patients were normal. These patients were studied from July 2012 to July 2014. Thirty parameters, which were obtained from Scheimpflug imaging (Oculus GmBH) and derived from pachymetry, curvature, anterior and posterior elevation, asphericity, and others, were analyzed. Asymmetry was determined by subtracting the right eye value from the left eye value for each variable and by considering the absolute value of the result. Receiver operating characteristic curves and logistic regression analysis were used. In the hyperopic astigmatism group, the mean intereye asymmetries in maximum keratometry, maximum posterior elevation, and maximum anterior elevation were 0.35 diopters (D), 4.67 μm, and 2.5 μm, respectively. In the myopic astigmatism group the asymmetries were 0.33 D, 5.38 μm, and 2.13 μm, respectively. In the astigmatism group the asymmetries were 0.18...Continue Reading

References

Sep 28, 2002·Cornea·Karla ZadnikUNKNOWN CLEK Study Group. Collaborative Longitudinal Evaluation of Keratoconus
Sep 21, 2004·The British Journal of Ophthalmology·D M BurnsA J Jackson
Jun 28, 2008·Journal of Refractive Surgery·Stephen S KhachikianJoseph B Ciolino
Jan 24, 2014·American Journal of Ophthalmology·Gi Hyun BaeTae-Young Chung
Oct 18, 2014·Journal of Refractive Surgery·Alain SaadDamien Gatinel
Jan 31, 2015·American Journal of Ophthalmology·Susanne GoebelsAchim Langenbucher

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Citations

Apr 14, 2016·American Journal of Ophthalmology·Mohammad NaderanParviz Zarrinbakhsh
Apr 23, 2017·The British Journal of Ophthalmology·Mohammad NaderanParviz Zarrinbakhsh

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