A corneal transplant procedure, where all parts of defected/damaged parts of patient's cornea are replaced with a healthy donor corneal tissue. A circular button shaped section of corneal tissue is removed with the help of trephine (cylindrical blade type instrument), femtosecond laser (a laser cutting device) or scalpels (knife with small blades). Then a similar button shaped portion from donor's cornea is positioned in the patient's cornea and is sutured along its circumference.
A corneal transplant procedure, where inner layers of the patient's cornea is replaced with a healthy donor corneal tissue. Through incisions around the sides of cornea, its inner layers (descemet's membrane and endothelium) are removed/stripped using descemet's irrigation/stripper instruments. Then the donor graft/corneal tissue is folded and placed inside the cornea. Air bubble is delivered into the cornea via cannula (a thin tube) to unfold and position the graft.
A corneal transplant procedure, where inner layers of the patient's cornea is replaced with donor cornea's inner layers (without stromal tissues). Through incisions around the sides of cornea, its inner layers (descemet's membrane and endothelium) are selectively removed. Then the donor's corneal endothelium and descemet's membrane are separated carefully from their tissues and are placed inside the patient's cornea. Air bubble is delivered into the cornea via cannula (a thin tube) to unfold and position the graft.
A corneal transplant procedure, where patient's corneal stroma (a layer below the upper layer) of cornea is replaced with donor's corneal tissues. Using trephine (a cylindrical blade type instrument) and scalpels, the patient's anterior stroma tissues are carefully removed and are replaced with donor's corneal tissues (having only stroma tissues separated from endothelium and descemet's membrane). The donor's corneal graft/tissue is positioned in the patient's cornea and is sutured along its circumference.
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