Where does corneal tissue come from?
Eye tissue is acquired from an eye bank, which is a medical facility that obtains human eye tissue from donors for the purpose of corneal transplants, ophthalmic research, or educational training. Eye banks employ highly trained technicians to remove eye tissue from an individual who has designated their decision to donate at the time of death. The removal of the eye tissue from a donor is performed as soon as possible following death. Donor eye tissue is then stored in preservation medium and refrigerated in the eye bank laboratory. A technician microscopically examines the cornea for defects and numerous tests are performed to ensure that there is no harm of transmitting diseases such as HIV/AIDS, or Hepatitis B and C viruses. All donors are carefully screened before the tissue is transplanted.
Some causes of these defects in the cornea may be attributed to various eye diseases known to affect and even destroy a healthy cornea. Keratoconus is a thinning disorder of the cornea where a cone-shaped protrusion forms. This abnormality prevents entering light rays from passing through the cornea properly.