Slit-lamp photograph showing the coexistence of the two segment types in the same cornea: Synthetic (white arrowhead) and Allogenic (black arrowheads) at optical zones of 7 and 5 mm, respectively.
The first reports detailing the coexistence of synthetic PMMA and CAIRS within the same cornea. Its where no synthetic segment dares to go - an optical zone of 4.5 mm and at a depth of 250 microns.