Tissue patches are commonly used in glaucoma surgery to cover glaucoma shunts, which are devices implanted to help drain excess fluid from the eye and reduce intraocular pressure. These patches, often made from donor tissues like cornea, sclera, or pericardium, serve as a protective barrier over the shunt. They help prevent erosion of the conjunctiva, the thin membrane covering the eye, and reduce the risk of exposure or extrusion of the shunt. By providing structural support, tissue patches contribute to the long-term success of the shunt and help maintain stable intraocular pressure, which is crucial for preserving vision in glaucoma patients.

 

However, the use of tissue patches to cover glaucoma shunts can lead to complications. One significant concern is the risk of infection, as the introduction of foreign material can potentially lead to microbial contamination. Additionally, there is a possibility of patch rejection or degradation over time, which can compromise the integrity of the shunt.