Which of the following statements regarding corneal transplantation is true

C i.e. Specular microsocopy analysis is used to assess endothelial cell count Donor cornea is most commonly preserved as corneal scleral button (cornea with 2-3 mm sclera/ rim)Q. HLA matching is not mandatoryQ. Cornea from donors between 5-60/70 years age are preferred but the age limits at both ends are arbitraryQ. Specular microscopy >Slit lamp examination are most impoant quality control evaluation used to assess endothelial cell count of donor corneaQ.