Patch graft is the name given to the donor cornea applied over a smaller area of diseased or damaged cornea unlike entire diameter of cornea being replaced in corneal transplantation. So, this procedure is also called as segmental corneal transplantation. The common indications are corneal perforation in a long-standing ulcer, progressive thinning disorders such as Keratoconus, melting of cornea following acid or alkali burns.

The procedure aims to restore the structural integrity of the eyeball as well as restoring the vision by providing a functional cornea. Additionally, it can help in faster healing of the disease as in bacterial/ fungal corneal ulcers.

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