In this issue of JOCO, Safarzadeh and his coworker havepresented “Anterior segment characteristics in normal andkeratoconus eyes evaluated with a combined Scheimpflug/Placido corneal imaging device”. They randomly selected oneeye of 200 patients with different degrees of keratoconus(suspect, mild, moderate, and severe) and compared them withone eye of 25 healthy individuals. They used combinedScheimpflug/Placido control imaging device to determinecorneal thickness at the apex, thinnest corneal thickness(TCT), anterior chamber depth (ACD), corneal volume, cor-neal keratometry, and asphericity of corneal elevation at twosurfaces, and also the Zernike coefficients for aberrations.TCT, corneal thickness at the apex (CTA), and posterior cor-neal elevation were significantly different in all groups(p < 0.05). Mean volume of cornea in healthy cases comparedwith suspect KC, mild KC, and moderate KC showed stat-istically significant changes (p < 0.05). There were statisti-cally significant differences in aberrometric values in mostgroups. Keratoconus is characterized by corneal thinning andectasia. 1 There are also changes in high order aberrationswhich are needed to be recognized for correct management ofthe disorder.
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