Corneal tissue addition keratoplasty, or CTAK, is a novel intrastromal lamellar keratoplasty technique for the treatment of keratoconus.
Given my long-standing interest in keratoconus, in 2015 I started working with preserved corneal tissue inlays to recontour the irregular keratoconus corneal shape. Early implantations of shaped tissue inlays of various sizes, under an institutional review board protocol, gave excellent improvements in corneal topography; however, visual acuity outcomes were not satisfactory, likely secondary to the graft interface over the pupil. Thus, the procedure has