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REVIEW ARTICLE
Year : 2018  |  Volume : 66  |  Issue : 9  |  Page : 1239-1250

Lamellar keratoplasty techniques


1 Division of Clinical Neuroscience, University of Nottingham, UK
2 Queen's Medical Centre, Nottingham University Hospitals NHS Trust; Division of Clinical Neuroscience, University of Nottingham, UK

Correspondence Address:
Dr. Harminder Singh Dua
Academic Ophthalmology, B Floor, Eye Ent Centre, Queen's Medical Centre, Derby Road, Nottingham
UK
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijo.IJO_95_18

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Lamellar keratoplasty (LK) has revolutionized corneal graft surgery in several ways. Deep anterior LK (DALK) has eliminated risk of failure due to endothelial rejection. Endothelial keratoplasty (EK) has almost eliminated induced astigmatism and the “weak” graft–host junction as seen with penetrating keratoplasty (PK) and also reduced the risk of endothelial rejection. LK provided new insights into posterior corneal anatomy that led to better understanding and performance of DALK and to the development of another EK procedure, namely pre-Descemet's EK (PDEK). Surgical procedures for LK were further refined based on the improved understanding and are able to deliver better surgical outcomes in terms of structural integrity and long-term patient satisfaction, reducing the need of further surgeries and minimizing patient discomfort. In most specialist centers, anterior lamellar techniques like DALK and EK techniques like Descemet's stripping EK (DSEK) and Descemet's membrane EK (DMEK) have replaced the full-thickness PK where possible. The introduction of microkeratome, femtosecond laser, and PDEK clamp have made LK techniques easier and more predictable and have led to the innovation of another LK procedure, namely Bowman membrane transplant (BMT). In this article, we discuss the evolution of different surgical techniques, their principles, main outcomes, and limitations. To date, experience with BMT is limited, but DALK has become the gold standard for anterior LK. The EK procedures too have undergone a rapid transition from DSEK to DMEK and PDEK emerging as a viable option. Ultrathin-DSEK may still have a role in modern EK.


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