“…We do not mean that previous researchers assume ECD or surface area as a single measurement of the degree of polymegethism. However, those parameters have been considered as single indicators of endothelial health, as several clinical studies in the fields of cataract surgery [12], diabetes, corneal refractive surgery [10], refractive surgery with intra-ocular lens implantation [17], contact lenses [6,18] and penetrating keratoplasty [10,19] use ECD as unique or major outcome for monitoring endothelium health changes related with the condition/intervention. Other studies combine several parameters to characterize endothelial health of the cornea within these areas of research [7,9,[20][21][22][23].…”