Investigator Initiated, Prospective Study of Xenia Corneal Lenticule

Inclusion Criteria: * Diagnosis of severe keratoconus in patients who would prefer to avoid corneal transplant surgery / penetrating keratoplasty OR * Diagnosis of severe post-LASIK Ectasia in patients who would prefer to avoid corneal transplant surgery / penetrating keratoplasty * In terms of general health, patients must be free of diagnosed terminal illnesses (life expectancy of greater than or equal to 2 years). * Patients must be aged 18 years or over and less than 80 years old * Patients' contact lenses must have been removed at least one-week prior to surgery for soft lenses and two weeks prior to surgery for hard lenses * Subject understands the study requirements and the treatment procedures and provides written Informed Consent before any study-specific tests or procedures are performed * Patient must be able and willing to complete all study visits and comply with the study-specific requirements Exclusion Criteria: * History or presence of any ocular pathologies that may interfere with the planned surgical treatment, including corneal epithelial problems * Previous corneal transplantation or corneal implant in the designated eye * Cataract with anticipated surgical intervention (IOL implantation) within 2 years * Active inflammation and/or infection of the eye or the eye lid * Patients with Intra Ocular Pressure (IOP) \<10 mmHg or \>21 mmHg * Professionally diagnosed and currently treated autoimmune diseases * Current strong symptoms of any allergy * History of major organ transplantation and/or current continuing immunosuppressive treatment * History of blood transfusion within the last 12 months * Subject who is currently participating or has participated in another investigational clinical study within the past 60 days Pregnancy and lactation