Rev Bras Oftalmol.2015;74(2):61-62
Changing a paradigm: PTA is more important than the residual stromal bed as a risk factor for post -LASIK ectasia
DOI: 10.5935/0034-7280.20150014
Corneal ectasia after laser in situ keratomileusis (LASIK) is a complicationcharacterised by progressive corneal thinning and bulging, which may lead to significant visual loss.While most patients who develop post-LASIK ectasia present identifiable risk factors, especially preoperative changes on corneal topography with a Placido disc, ectasia in patients with normal preoperative tests is still a mistery. 1,2 This editorial presents a new risk factor called Percentage ofTissue Altered,or PTA […].
Changing a paradigm: PTA is more important than the residual stromal bed as a risk factor for post -LASIK ectasia