Can Someone Donate 1 Eye?

Living Donation - Very Rare Exceptions Only

1. Eye being surgically removed due to disease - If a patient has an ocular tumor (e.g., cancer at the back of the eye) and the eye must be surgically removed, the healthy front portion (cornea) may be donated at the time of surgery.
2. A blind eye being removed - If someone's eye is already blind and must be removed, but the cornea is still healthy, that cornea can be used for transplant.
3. Self-donation between one's own eyes - In extremely rare cases, someone with one seeing eye and one non-seeing eye can donate their cornea from the blind eye to their own seeing eye.

Eye Donation After Death

• Donation happens after death (post-mortem).
• What is actually transplanted is the cornea (the clear front surface) - not the whole eye. Whole-eye transplantation is not currently possible.
• One deceased donor can donate both corneas, potentially restoring sight to two different recipients.
• Corneal transplantation is one of the most common transplant procedures - over 44,000 are performed every year in the US alone (per University of Iowa Health Care).
• Eye donors do not need to be matched by blood type - almost anyone can donate.
• People with bad eyesight, cataract surgery, or LASIK surgery can still donate.

Key Points

Could a Friend Donate 1 Eye to a Blind Person?

The Short Answer: No — Not Currently Possible

1. Whole Eye Transplantation Does Not Exist Yet

• The eye is not like a kidney. It is directly wired to the brain via the optic nerve — a bundle of over 1 million nerve fibers.
• When the optic nerve is cut (which happens during eye removal), it cannot be reconnected. Nerve regeneration in the central nervous system does not occur in humans.
• Even if a surgeon physically placed a donated eye into the socket, the brain would have no way to receive visual signals from it. The person would still be blind.
• This is fundamentally different from organs like kidneys or liver, where blood vessels can be surgically reconnected and the organ functions immediately.

2. Ethical & Medical Prohibition on Harming a Healthy Donor

• Removing a healthy, functioning eye from a living person causes permanent, irreversible blindness in that eye.
• Medical ethics (the principle of "first, do no harm") forbids performing surgery that causes serious, permanent harm to a healthy person — even with their full consent.
• No hospital or surgeon would perform this operation, and it is illegal in most countries.

What About a Cornea Transplant from a Living Friend?

• The cornea (clear front layer) can technically be taken from a living person whose eye is being removed for medical reasons — but not from a healthy eye.
• If the friend's eye is perfectly healthy, surgeons cannot remove just the cornea either, as it would destroy that eye's vision.

The Future: Is Whole Eye Transplant Being Researched?

• In 2023, surgeons at NYU Langone Health performed the world's first whole-eye transplant as part of a face transplant procedure. The eye survived and appeared healthy, but the patient did not regain vision — because reconnecting the optic nerve remains unsolved.
• Researchers are actively working on optic nerve regeneration using stem cells, gene therapy, and nerve growth factors.
• Full functional whole-eye transplantation may become possible in the future, but it is not available today.

Summary Table