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ISSN 2063-5346
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Femto-assisted penetrating kearoplasty and suction trephination conventional penetrating keratoplasty (types, techniques, advantages and disadvantages)

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Ahmed A Abdelghany, Mohamed Salah El-Din Mahmoud, Mahmoud Ramadan Amer, Mohamed Hosny & Hosam A Ibrahim Elzembely
» doi: 10.31838/ecb/2023.12.3.103

Abstract

In order to enhance donor-to-host alignment, boost wound stability, maintain more healthy endothelium, and enhance final best spectacle-corrected visual acuity, numerous donor and host corneal cutting procedures have been developed over time (BSCVA). The traditional method of corneal transplantation in most countries is still done manually, using a cylindrical blade trephine and punch to make donor and host corneal buttons. This is because it is relatively inexpensive and accessible. The vacuum trephine is commonly employed in the United States for conventional penetrating keratoplasty (PKP). The blade trephine produces a wound with a vertical, straight edge. It requires numerous somewhat tight sutures to support the demands of intraocular pressure since it is relatively unstable and sluggish to heal. In addition to uneven suture tension, donor and host corneal tissue's vertical and rotational misalignment causes optical distortion, which increases postoperative astigmatism and decreases BSCVA. It was suggested that stepped corneal incisions with horizontal lamellar donor-host contact surfaces might enhance incisional alignment and wound stability. The typical method for making these incision patterns has proved to be technically difficult, which has limited their broad adoption. BCVA and postoperative astigmatism have been found in numerous trials using the FSL for PKP to be superior to or on par with traditional PKP. Postoperative endothelial cell counts associated with FSL-assisted PKP are similar to or superior to those associated with traditional PKP, according to the literature.

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