Incidence and Tomographic Evaluation of Unilateral Keratoconus

Abstract

Pur po se: To evaluate the parameters of unilateral keratoconus on the basis of Scheimpflug tomography and to compare them with normal controls. Ma te ri al and Met hod: From all patients diagnosed with keratoconus between January 2011 and January 2012, those who had topographic signs of keratoconus in one eye were retrospectively evaluated. Unilateral keratoconus eyes were compared with the normal fellow eyes and control eyes. Anterior and posterior keratometry, topographic astigmatism, axis, asphericity and central corneal thickness, corneal and anterior chamber volume and depth in all cases were evaluated with Pentacam. ANOVA test was used for statistical analysis. Re sults: 22 (14.9%) of 147 patients with keratoconus had no topographic evidence of keratoconus in the fellow eye. Statistically significant differences were noted between keratoconic eyes and fellow eyes, and between keratoconic eyes and control eyes in anterior keratometric values, posterior steep and mean keratometry, anterior and posterior astigmatism, anterior and posterior asphericity and central corneal thickness (p=0.05). Posterior flat keratometry and anterior chamber depth were different between keratoconus and control eyes (p=0.004, p=0.006) but similar between keratoconus and fellow normal eyes (p=0.069, p=1.0). Dis cus si on: The Scheimpflug parameters were similar between fellow eyes and control eyes. (Turk J Ophthalmol 2013; 43: 83-6)

Keywords

• Keratoconus
• topography
• pentacam