Though transplanting tissues cannot be done from one person to another, cornea can be transplanted without rejection of tissues because it has no blood vessels.
Explanation:
The outermost layer of human eyes is Cornea. This is in the shape of a dome and the eye's front portion is covered. It is a major component for the purpose of focusing vision. It has Epithelium which is the outer portion of the cornea.
Bowman's membrane is a layer that lies below the epithelium layer. Stroma, Endothelium and Descemet's membrane are the other parts of cornea. The transplantation of tissues from a human to another human is not possible.
Cornea does not have blood vessel and hence it is possible for the transplantation of cornea from one person to another person.