Central corneal thickness measurement with different devices in keratoconic patients

We read with great interest the article by Aghazadeh Amiri et al. concerning the corneal thickness (CT) measurements with Scheimpflug and slit scanning imaging techniques in keratoconus (KC). We would like to congratulate with the authors for their very interesting paper because it is well known that the measurement of CT is involved in the reliability of intraocular pressure measurements, both in virgin eyes2,3 and in those that underwent photorefractive keratectomy (PRK),4 but it is also fundamental in deciding which technique can be more appropriate for the treatment of KC.