Corneal transplantation and donation

The cornea is the ‘window of the eye’ – the clear dome-like surface at the front of the

eye

and the main focusing element. If a cornea becomes cloudy from disease, injury or infection, vision is dramatically reduced.

A corneal transplant is a surgical procedure that replaces a disc-shaped segment of an unhealthy cornea with a similarly shaped piece of healthy donor cornea. Only human donor tissue can be used in corneal transplantation surgery. This operation is also called a corneal graft or keratoplasty.

Conditions that require a corneal transplant

The most common reasons for requiring a transplant are:

Dystrophy’s directly affecting the cornea, the most common being Fuch’s Dystrophy where the cornea becomes opaque leading to loss of vision. Other dystrophies are lattice, granular,

macular dystrophies

bullous keratopathy – a condition in which the cornea becomes permanently swollen

keratoconus – a corneal dystrophy in which the central zone of the cornea thins and becomes irregularly curved

eye injury

herpes virus infection of the eye

corneal scarring due to

trauma

hereditary or congenital corneal clouding

severe bacterial infection.

Corneal transplantation procedure

Corneal transplant is the oldest and most common form of human

transplantation

(other than

blood transfusion

). In Australia, approximately 2,000 corneal transplants are performed each year.

Corneal transplantation success rates

Cornea transplant operations are very successful. According to the Australian Corneal Graft Registry, the average one-year transplant survival rate is approximately 90 per cent, decreasing to 75 per cent at five years.

Cornea donation

Almost anyone can donate their corneas (or other parts of their eyes). Unlike in

organ donation

, age and

blood

type are unimportant in determining cornea donor suitability. Similarly, donor eye colour and eyesight quality are not barriers to donation.

However, people with severe infections, haematological malignancies, transmissible neuropathological diseases, or communicable diseases such as

HIV

and

hepatitis

, cannot donate their corneas. Suitability after previous eye surgery or in the donor is assessed at the time of donation.

Telling your next of kin about your wishes is crucial for you to become a cornea donor at the time of your death. Individuals can also register with the

Australian Organ Donor

External Link

Using donated corneas

An eye bank is notified on the death of a potential donor who meets preliminary donation criteria. Retrieval of the cornea typically occurs within hours of death.

If a donor cornea is unsuitable for transplant, eyes may be used for research and training, when consent is given for that purpose.

Where to get help

Your

GP (doctor)

Optometrist

Ophthalmologist (eye specialist)

Centre for Eye Research

Australia

External Link

Australian Organ Donor

External Link