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Deep lamellar

Giuseppe Giannaccare, Jayne S Weiss, Laura Sapigni, Cristina Bovone, Leila Mattioli, Emilio C Campos, Massimo Busin
PURPOSE: To evaluate the rate and outcomes of immunologic stromal rejection occurring after large deep anterior lamellar keratoplasty (DALK) and the effect of the underlying disease on the cumulative probability of rejection. METHODS: This was a retrospective chart review of all eyes that underwent a 9-mm DALK at Ospedali Privati Forlì (Forlì, Italy). On the basis of preoperative diagnosis, eyes were assigned to group 1: keratoconus, group 2: stromal disease with a low risk for rejection, or group 3: stromal disease with a high risk for rejection...
March 14, 2018: Cornea
Dylan K Wainwright, Sam Ingersoll, George V Lauder
Tunas of the genus Thunnus possess many morphological and physiological adaptations for their high-performance epipelagic ecology. Although Thunnus anatomy has been studied, there are no quantitative studies on the structure of their scales. We investigated the scales of bigeye tuna (Thunnus obesus) from ten regions of the body using micro computed tomography (µCT)-scanning and histology to quantitatively and qualitatively compare regional scale morphology. We found a diversity of scale sizes and shapes across the body of bigeye tuna and discriminant function analysis on variables derived from µCT-data showed that scales across the body differ quantitatively in shape and size...
March 14, 2018: Journal of Morphology
Takahiko Hayashi
No abstract text is available yet for this article.
March 6, 2018: Cornea
Wen-Jia Xie, Ye-Sheng Xu, Xia Zhang, Yu-Feng Yao
OBJECTIVE: To assess the lower tear meniscus height (LTMH), central tear film thickness (CTFT), and central corneal epithelial thickness (CCET) after deep anterior lamellar keratoplasty (DALK). METHODS: This was a retrospective cross-sectional study of 20 patients who had DALK in one eye over a three-month period. LTMH, CTFT, and CCET of the operated eyes and the unoperated fellow eyes were measured using high-definition optical coherence tomography (HD-OCT). Correlations between three OCT assessments and age, time following surgery, graft size, bed size, and the number of residual sutures were analyzed...
2018: Journal of Zhejiang University. Science. B
Oganes G Oganesyan, Vladimir V Neroev, Arthur A Grdikanyan, Vostan R Getadaryan
PURPOSE: To describe the feasibility of same-day, consecutive use of a single donor cornea in 5 patients with corneal pathology, who required anterior lamellar and endothelial keratoplasties. METHODS: Descemet membrane (DM) with endothelium was completely stripped from a single corneoscleral button and punched out from the endothelial side with a circular, standard punch. Using a custom-made punch for linear cutting of DM, we obtained 4 quarter-grafts (Q-graft)...
February 27, 2018: Cornea
Adi Einan-Lifshitz, Nir Sorkin, Tanguy Boutin, Zale Mednick, Mohammad Kreimei, Clara C Chan, David S Rootman
PURPOSE: To suggest a new surgical approach for posterior opacities or persistent Descemet membrane (DM) detachment in failed deep anterior lamellar keratoplasty (DALK) and to report the outcome of Descemet membrane endothelial keratoplasty (DMEK) in a series of patients with DALK failure. METHODS: In this retrospective case series of patients who underwent DMEK for failed DALK at Toronto Western Hospital, 4 patients with failed DALK who underwent DMEK surgery were included...
February 22, 2018: Cornea
Xiaolei Lin, Yue Wu, Yana Fu, Qi Dai
RATIONALE: To report a case of late spontaneous reattachment of Descemet membrane (DM) detachment after deep anterior lamellar keratoplasty (DALK). PATIENT CONCERNS: A 50-year-old woman with stromal corneal scarring underwent a DALK with the big bubble technique. The DM detachment and double anterior chamber were observed on the first day after operation. DIAGNOSES: Descemet membrane detachment after deep anterior lamellar keratoplasty [Oculus Dexter (OD), indicates right eye]...
February 2018: Medicine (Baltimore)
Korine van Dijk, Jack S Parker, Lamis Baydoun, Abbas Ilyas, Isabel Dapena, Esther A Groeneveld-van Beek, Gerrit R J Melles
PURPOSE: The purpose of this study was to evaluate the 5-year clinical results of isolated Bowman layer (BL) transplantation in the treatment of advanced keratoconus. METHODS: In this prospective, single-center, interventional case series at a tertiary referral center, 20 eyes of 17 patients with advanced keratoconus underwent BL transplantation, i.e. an isolated Bowman layer graft was positioned into a manually dissected mid-stromal pocket. Scheimpflug-based corneal tomography measurements, best corrected spectacle and contact lens visual acuities (BSCVA and BCLVA), endothelial cell density, and complications were evaluated up to 5 years after surgery...
February 14, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
S X Li, J T Wang, Y Jiang, X Wang, W Y Shi
Objective: To evaluate the efficacy of modified deep lamellar keratoplasty (DLKP) combined with antiviral medications for severe herpes necrotizing stromal keratitis. Methods: Retrospective case series study. Modified DLKP was performed in combination with antiviral medications in fifty patients (50 eyes) with severe necrotizing stromal keratitis, which was unresponsive to systemic and topical antiviral treatment for 1 week, at Shandong Eye Hospital. Before surgery, the operated eyes were examined using slit-lamp microscopy...
February 11, 2018: [Zhonghua Yan Ke za Zhi] Chinese Journal of Ophthalmology
Aipeng Li, Yingnan Zhang, Zhiqiang Pan
No abstract text is available yet for this article.
February 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
E Flockerzi, P Maier, D Böhringer, H Reinshagen, F Kruse, C Cursiefen, T Reinhard, G Geerling, N Torun, B Seitz
PURPOSE: The purpose of this retrospective panel study was to provide an overview of absolute numbers, trends in the types of and indications for corneal transplantation in Germany from 2001 to 2016. METHODS: A questionnaire about absolute numbers, types of transplantation and indications was sent to 111 ophthalmological departments in Germany out of which 94 (85%) provided their data. RESULTS: Since the year 2001, the number of corneal transplantations has increased by 1...
February 1, 2018: American Journal of Ophthalmology
Kirstin Casdorff, Tobias Keplinger, Markus Rüggeberg, Ingo Burgert
AFM measurements on spruce sample cross-sections reveal that the structural appearance of the S2 layer changes from a network structure to a concentric lamellar texture depending on the cutting angle. The structural assembly of wood constituents within the secondary cell wall has been subject of numerous studies over the last decades, which has resulted in contradicting models on the spatial arrangement and orientation of the wood macromolecules. Here, we use multichannel atomic force microscopy by means of quantitative imaging, to gain new insights into the macromolecular assembly...
January 27, 2018: Planta
Uri Elbaz, Caitriona Kirwan, Carl Shen, Asim Ali
BACKGROUND/AIMS: To describe the visual and clinical outcomes of manual layer-by-layer deep anterior lamellar keratoplasty (DALK) in a paediatric population. METHODS: The charts of all children who underwent DALK surgery between January 2007 and January 2015 were reviewed retrospectively. Data collected included preoperative and postoperative spectacle-corrected distance visual acuity (CDVA), intraoperative and postoperative complications including graft rejection and failure...
January 4, 2018: British Journal of Ophthalmology
Myriam Cassagne, Vincent Soler, François Malecaze, Pierre Fournié
PURPOSE: To describe the surgical technique and report the outcomes of 2 patients treated with femtosecond laser-assisted ipsilateral rotational lamellar autokeratoplasty in central corneal scars. METHODS: The corneal scar depth was mapped using preoperative optical coherence tomography. An eccentric lamellar lenticule was cut with a femtosecond laser and rotated to decenter corneal opacity and free the pupil area in 2 patients with nonprogressive central corneal scars...
January 3, 2018: Cornea
Bo-I Ku, Yi-Ting Hsieh, Fung-Rong Hu, I-Jong Wan, Wei-Li Chen, Yu-Chih Hou
PURPOSE: To compare endothelial cell density (ECD) loss rates in penetrating keratoplasty (PKP), Descemet's stripping automated endothelial keratoplasty (DSAEK), and deep anterior lamellar keratoplasty (DALK). DESIGN: Single-center, multiple-surgeon, retrospective cohort study. MATERIALS AND METHODS: Patients who received PKP, DSAEK, or DALK from 2009 to 2014 were analyzed (68 vs. 38 vs. 11 patients, respectively). We excluded patients with therapeutic PKP or regraft, infection, endothelial rejection, or uncontrolled glaucoma...
October 2017: Taiwan Journal of Ophthalmology
Yi-Ju Ho, Cheng-Hsiu Wu, Hung-Chi Chen, Chin-Shi Hsiao, Yi-Jen Hsueh, David Hui-Kang Ma
PURPOSE: To report our experience in air-assisted manual dissection deep anterior lamellar keratoplasty (DALK) for the treatment of corneal scar with previous inflammation and fibrosis. MATERIALS AND METHODS: We retrospectively reviewed the medical history of 21 patients (male:female = 13:8 mean age 41.9 years old) with corneal pathology from previous infection and inflammation. Trephination diameter ranged from 7.0 to 8.0 mm, and the graft was oversized by 0.25-0...
October 2017: Taiwan Journal of Ophthalmology
Vincenzo Scorcia, Valentina De Luca, Andrea Lucisano, Adriano Carnevali, Giovanna Carnovale Scalzo, Cristina Bovone, Massimo Busin
AIM: To report the outcomes of bubble formation obtained by means of intrastromal injection of ophthalmic viscoelastic device (OVD) after failure of pneumatic dissection for deep anterior lamellar keratoplasty (DALK). METHODS: DALK was performed in 140 keratoconic eyes of 130 patients by injecting air and OVD only secondarily, after pneumatic dissection had failed; the bubble formation rates after air and OVD injection were recorded; complications, best spectacle-corrected visual acuity (BSCVA) and corneal tomographic parameters were evaluated 3 months, 6 months and 12 months postoperatively, as well as after complete suture removal...
December 23, 2017: British Journal of Ophthalmology
Fouad anNakhli, Ashbala Khattak
PURPOSE: To compare the refractive and keratometric changes induced by femtosecond laser astigmatic keratotomy (AK) for suture-out post-keratoplasty astigmatism in deep anterior lamellar keratoplasty (group I) and penetrating keratoplasty (group II). SETTING: Dhahran Eye Specialist Hospital, Dhahran, Saudi Arabia. DESIGN: Retrospective, comparative, interventional study. METHODS: This study comprised 15 eyes in group I and 35 eyes in group II...
December 22, 2017: International Ophthalmology
Samir Jabbour, Adam Muzychuk, Younes Agoumi, Mona Harissi-Dagher
Purpose: To report the first case of acute angle closure due to a high-pressure Descemet membrane detachment following deep anterior lamellar keratoplasty (DALK) using the "big bubble" technique. Observations: A 25-year-old man underwent DALK surgery for keratoconus using the "big bubble" technique in which an air bubble is injected in deep stroma to promote dissection of underlying Descemet membrane from stroma. Surgery was uneventful and the patient was discharged home in good conditions...
September 2017: American Journal of Ophthalmology Case Reports
Sungwon Shin, Jung Kweon Bae, Yujin Ahn, Hyeongeun Kim, Geonho Choi, Young-Sik Yoo, Choun-Ki Joo, Sucbei Moon, Woonggyu Jung
Deep anterior lamellar keratoplasty (DALK) is an emerging surgical technique for the restoration of corneal clarity and vision acuity. The big-bubble technique in DALK surgery is the most essential procedure that includes the air injection through a thin syringe needle to separate the dysfunctional region of the cornea. Even though DALK is a well-known transplant method, it is still challenged to manipulate the needle inside the cornea under the surgical microscope, which varies its surgical yield. Here, we introduce the DALK protocol based on the position-guided needle and M-mode optical coherence tomography (OCT)...
December 2017: Journal of Biomedical Optics
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