The simple answer is the deceased didn't tell any one. They thought it was enough to sign a card. It's not that simple. When someone dies, grief, confusion, and uncertainty all come together and often obscure a persons intentions. Don't let the confusion that will surround your death prevent your final act of generosity from taking place.
Corneal surgery is dependent upon a constant supply of corneal tissue from eye donors.
Eye donations are received from those people who have generously pledged thier eyes to be used, following their death. The best known use for donated eyes is the corneal transplant operation or Keratoplasty , in which the healthy cornea from a donated eye is used to replace the scarred or diseased cornea of the blind or visually impaired person. The corneal transplant operation consists of removing a disk of the opaque or clouded cornea from the recipient and replacing it with a similar segment of clear cornea from the donor eye. There is no evidence that race, sex, or blood group of the donor influence the outcome of the operation. The other structure of the eye receiving the transplant must be relatively normal and the eye must be capable of perceiving light.