scholarly journals Correlation of anterior segment optical coherence tomography measurements with graft trephine diameter following descemet stripping automated endothelial keratoplasty

2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Gavin S Tan ◽  
Mingguang He ◽  
Donald T Tan ◽  
Jodhbir S Mehta
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Optical Coherence ◽  
Endothelial Keratoplasty

scholarly journals ‘Acute-angled bevel’ sign to assess donor lenticule orientation in ultra-thin descemet stripping automated endothelial keratoplasty

2019 ◽  
Vol 12 (2) ◽  
pp. e227927 ◽  
Author(s):  
Jeewan S Titiyal ◽  
Manpreet Kaur ◽  
Farin Shaikh ◽  
Aafreen Bari
Keyword(s):  
Optical Coherence Tomography ◽  
Anterior Segment ◽  
Acute Angle ◽  
Optical Coherence ◽  
Endothelial Keratoplasty ◽  
Anterior Segment Oct ◽  
Intraoperative Optical Coherence Tomography ◽  
Congenital Hereditary Endothelial Dystrophy ◽  
Graft Insertion

A 6.5-year-old boy with congenital hereditary endothelial dystrophy underwent clear corneal ultra-thin descemet stripping automated endothelial keratoplasty (DSAEK). After graft insertion, it was difficult to assess graft orientation due to hazy cornea. Intraoperative optical coherence tomography (iOCT) showed a well-attached graft and the bevelled edge of donor lenticule made an acute angle with the overlying stroma. Postoperative anterior segment OCT confirmed the presence of acute-angled bevel sign. A wetlab experiment was performed with experimental corneoscleral tissues to confirm the findings. Donor lenticule was injected in the artificial chamber with stromal-side up as well as stromal side-down. ‘Acute-angled bevel sign’ was observed on iOCT in the experimental cases with stromal-side up. In inverse graft, the acute-angled bevel was not observed, instead the configuration was obtuse angled. Identifying the ‘acute-angled bevel sign’ on iOCT confirms correct graft orientation after unfolding and is extremely useful for hazy corneas and ultrathin DSAEK lenticules.

scholarly journals Intraoperative Optical Coherence Tomography Imaging in Corneal Surgery: A Literature Review and Proposal of Novel Applications

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Hiroshi Eguchi ◽  
Fumika Hotta ◽  
Shunji Kusaka ◽  
Yoshikazu Shimomura
Keyword(s):  
Optical Coherence Tomography ◽  
Corneal Transplantation ◽  
Anterior Segment ◽  
Lamellar Keratoplasty ◽  
Deep Anterior Lamellar Keratoplasty ◽  
Optical Coherence ◽  
Endothelial Keratoplasty ◽  
Corneal Surgery ◽  
Anterior Lamellar Keratoplasty ◽  
Intraoperative Optical Coherence Tomography

Intraoperative optical coherence tomography (iOCT) is widely used in ophthalmic surgeries for cross-sectional imaging of ocular tissues. The greatest advantage of iOCT is its adjunct diagnostic efficacy, which facilitates to decision-making during surgery. Since the development of microscopic-integrated iOCT (MIOCT), it has been widely used mainly for vitreoretinal and anterior segment surgeries. In corneal transplantation, MIOCT allows surgeons to visualise structure underneath the turbid and distorted cornea, which are impossible to visualise with a usual microscope. Real-time visualisation of hard-to-see area reduces the operation time and leads to favorable surgical outcomes. The use of MIOCT is advantageous for a variety of corneal surgical procedures. Here, we have reviewed articles focusing on the utility of iOCT  and MIOCT in penetrating keratoplasty, deep anterior lamellar keratoplasty, Descemet stripping automated endothelial keratoplasty, and Descemet membrane endothelial keratoplasty. The applications of MIOCT to corneal surgery in terms of surgical education for trainees, emergency surgery, and novel surgery are also discussed, with our cases performed using RESCAN® 700.

scholarly journals Descemet Membrane Endothelial Keratoplasty: Intraoperative and Postoperative Imaging Spectral-Domain Optical Coherence Tomography

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Marcus Ang ◽  
Adam M. Dubis ◽  
Mark R. Wilkins
Keyword(s):  
Optical Coherence Tomography ◽  
Corneal Thickness ◽  
Anterior Segment ◽  
Spectral Domain ◽  
Optical Coherence ◽  
Endothelial Keratoplasty ◽  
Descemet Membrane Endothelial Keratoplasty ◽  
Descemet Membrane ◽  
Postoperative Imaging ◽  
Initial Adhesion

We describe a case report of using the same handheld spectral-domain anterior segment optical coherence tomography (ASOCT) for rapid intraoperative and postoperative imaging in a case of Descemet membrane endothelial keratoplasty (DMEK). A 67-year-old woman, with Fuchs dystrophy and corneal decompensation, underwent DMEK with intraoperative ASOCT imaging using the handheld Envisu spectral domain ASOCT system (Bioptigen, Inc., Morrisville, NC, USA). We found that this easy-to-use portable system with handheld probe allowed for rapid imaging of the anterior segment during donor manipulation to visualize the orientation of the DMEK donor, as well as to confirm the initial adhesion of the DMEK donor. Moreover, the same system may be used for postoperative monitoring of graft adhesion, corneal thickness, and stromal remodeling in the clinic with very high-definition images.

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