METHOD FOR PREPARATION OF THREE CORNEAL GRAFTS FROM ONE DONOR CORNEA Russian patent published in 2024 - IPC A61F9/07 A61F9/08 

FIELD: medicine; ophthalmology.

SUBSTANCE: three corneal grafts are prepared from one donor cornea. Femtosecond laser is used to perform a first circular section of the corneal stroma with diameter of 8 mm, which is calculated so that the residual thickness of the cornea from endothelium is 125 mcm. Second section is in the lamellar plane at depth of 125 mcm from the endothelium, with diameter of 10 mm. Third section is circular and is made from depth of 125 mcm upwards towards the endothelium, with diameter of 10 mm. Then, a radial cut is made in a vertical plane, which divides the corneal graft into two equal parts. Further, the endothelial grafts are separated with a blunt spatula, after which the anterior graft is separated from the corneoscleral disc of the donor, which is then subjected to a corneal collagen crosslinking procedure with preliminary de-epithelization.

EFFECT: method provides obtaining three quality uniform grafts, enables to increase the number of transplants for patients with endothelial corneal dystrophies and keratoconus, restore visual rehabilitation of patients with keratoconus due to cross-linking of anterior graft after dissection of donor cornea and provides absence of risk of secondary transplant ectasia.

1 cl, 3 ex