Device Revives Donor Eyeballs for Potential Transplants

Researchers have developed a device that can maintain and revive donor eyeballs using a technique called perfusion, a significant step towards making whole eye transplants a viable surgical option. The current difficulty in eye transplantation stems from the rapid degeneration of the organ after removal from the body and the complexity of the surgery itself. Early attempts at eye transplantation resulted in the transplanted eyes being unable to see.

The Eye-in-a-Care-Box (ECaBox), developed by Pia Cosma and her colleagues at the Centre for Genomic Regulation in Spain, addresses this degeneration. The device works by supplying surgically removed eyes with oxygen and nutrients through a fluid delivered via the artery that normally carries blood to the eye. This perfusion process aims to prevent the rapid degradation of eye tissues, preserving their electrical signaling capabilities and the potential for vision. Shannon Tessier of Massachusetts General Hospital, who was not involved in the research, described the development as "really cool" and potentially a "new frontier for retina preservation."

The ECaBox is designed to maintain a specific temperature and pressure within its sealed environment, while a transparent window allows for continuous study and imaging of the eye. The research team initially experimented with pig eyes, which share anatomical similarities with human eyes, obtaining them from a local slaughterhouse. Pig eyes kept at room temperature outside the device showed rapid degeneration, with cells shrinking and structural integrity being lost. Cooling the organs to 4°C also proved insufficient, with degeneration occurring within 24 hours.

By utilizing the perfusion technique within the ECaBox, the treated eyes demonstrated a slower rate of degradation and appeared to retain their ability to transmit electrical signals. This advancement suggests that the ECaBox could overcome the critical hurdle of organ viability, paving the way for future research and clinical trials aimed at restoring sight through whole eye transplantation. The technology offers a promising new avenue for regenerative medicine and the treatment of blindness.