Laser ablative radiation is used to remove the epithelial layer from over the stromal layer in a cornea. While uniform exposure of a single or scanned ablative beam will generally remove peripheral portions of the epithelial layer faster than central portions, such non-uniform removal is corrected by...http://www.google.co.uk/patents/US6068625?utm_source=gb-gplus-sharePatent US6068625 - Method and system for removing an epithelial layer from a cornea
