<prompt> Not an indication of given prosthesis :Crouzon DiseaseOCP Stage 1 or 2Multiple failed Penetrating KeratoplastyEpidermolysis Bullosa Acquisita  <response>: Boston Keratoprosthesis Indications SJS, OCP Stage 3 Or 4 , TEN, Epidermolysis Bullosa Acquisita Chemical Injury Loss Of Lids Crouzon Disease Vascularised cornea with complete stem cell deficiency And dryness Aniridia With severe corneal changes Multiple failed Penetrating Keratoplasty 