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Wang ZW, Yin XF, Wang CX, Wang HZ, Zhou SY. Anterior segment optical coherence tomography for superficial keratectomy. Photodiagnosis Photodyn Ther 2024; 48:104237. [PMID: 38871017 DOI: 10.1016/j.pdpdt.2024.104237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 05/25/2024] [Accepted: 06/05/2024] [Indexed: 06/15/2024]
Abstract
PURPOSE To report the use of anterior segment optical coherence tomography (AS-OCT) for superficial keratectomy (SK) in anterior corneal opacity. METHODS The characteristics of 43 eyes (39 patients) with various lesions responsible for anterior corneal opacity were included in this retrospective non-comparative study. AS-OCT was performed on all eyes before surgery. The thickness of corneal opacity and the underlying healthy stroma were measured. SK was performed on each individual. RESULTS Four types of anterior corneal opacity were evaluated, including corneal degeneration (26/43), Reis-Bücklers corneal dystrophy (8/43), alkali burn (1/43) and corneal tumors (8/43). Based on AS-OCT images, all eyes showed abnormal hyper-reflective signals in the superficial cornea to less than one-third of the normal corneal thickness in the deepest corneal opacity. All 43 eyes underwent an SK procedure. In addition, 1 eye with alkali burns and 7 eyes with corneal tumors were combined with amniotic membrane transplantation. All eyes restored transparency without significant complications. CONCLUSION AS-OCT is a valuable method for objective preoperative and noninvasive assessments of anterior corneal opacities and is useful for guiding SK.
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Affiliation(s)
- Zi-Wen Wang
- Department of Ophthalmology, Jiangxi Yingtan People's Hospital, Jiangxi Province, China
| | - Xiao-Fang Yin
- Department of Ophthalmology, The Second People's Hospital of Guangdong Foshan, China
| | - Chun-Xiao Wang
- The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, SunYat-sen University, Guangzhou, China
| | - Hui-Zhen Wang
- Department of Ophthalmology, Jiangxi Yingtan People's Hospital, Jiangxi Province, China; The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, SunYat-sen University, Guangzhou, China
| | - Shi-You Zhou
- The State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, SunYat-sen University, Guangzhou, China.
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Janiszewska-Bil D, Czarnota-Nowakowska B, Kuciel-Polczak I, Dobrowolski D, Grabarek BO, Lyssek-Boroń A, Wylęgała E, Wierzbowska J. Assessment of Changes in Cap and Residual Stromal Thickness Values during a 6-Month Observation after Refractive Lenticule Extraction Small Incision Lenticule Extraction. J Clin Med 2024; 13:2148. [PMID: 38610913 PMCID: PMC11012741 DOI: 10.3390/jcm13072148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024] Open
Abstract
Background: In this study, the changes in corneal cap and residual stromal thickness (RST) values during a 180-day observation period after refractive lenticule extraction small incision lenticule extraction (ReLEx SMILE) were assessed. Methods: Fifty patients underwent ReLEx SMILE using the VisuMax 500 femtosecond laser, with corneal imaging conducted pre and post procedure via anterior segment optical coherence tomography (AS-OCT). Cap thickness in the center and 1.5 mm from the center in four meridians was measured at various intervals. Results: The results showed a significant decrease in cap thickness 180 days post procedure compared to earlier intervals (p < 0.05). Similarly, RST decreased gradually and significantly post procedure (p < 0.05). Notably, changes in cap thickness within the central 1.5 mm area were more dynamic than RST changes during the 6-month observation period following SMILE. Conclusions: The corneal cap thickness measured with swept-source AS-OCT within the central 1.5 mm area underwent more dynamic changes than the residual stromal thickness during the 6-month observation following SMILE.
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Affiliation(s)
- Dominika Janiszewska-Bil
- Department of Ophthalmology, Trauma Centre, St. Barbara Hospital, 41-200 Sosnowiec, Poland; (I.K.-P.); (D.D.); (A.L.-B.)
- Optegra Clinic in Katowice, 40-101 Katowice, Poland
- Collegium Medicum, WSB University, 41-300 Dabrowa Gornicza, Poland;
| | | | - Izabela Kuciel-Polczak
- Department of Ophthalmology, Trauma Centre, St. Barbara Hospital, 41-200 Sosnowiec, Poland; (I.K.-P.); (D.D.); (A.L.-B.)
| | - Dariusz Dobrowolski
- Department of Ophthalmology, Trauma Centre, St. Barbara Hospital, 41-200 Sosnowiec, Poland; (I.K.-P.); (D.D.); (A.L.-B.)
- Clinical Department of Ophthalmology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-760 Katowice, Poland;
- Department of Ophthalmology, District Railway Hospital, 40-760 Katowice, Poland
| | | | - Anita Lyssek-Boroń
- Department of Ophthalmology, Trauma Centre, St. Barbara Hospital, 41-200 Sosnowiec, Poland; (I.K.-P.); (D.D.); (A.L.-B.)
- Optegra Clinic in Katowice, 40-101 Katowice, Poland
- Optegra Clinic in Krakow, 30-347 Krakow, Poland
| | - Edward Wylęgała
- Clinical Department of Ophthalmology, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 40-760 Katowice, Poland;
- Department of Ophthalmology, District Railway Hospital, 40-760 Katowice, Poland
| | - Joanna Wierzbowska
- Department of Ophthalmology, Central Clinical Hospital of the Ministry of National Defense, Military Institute of Medicine in Warsaw, 04-141 Warsaw, Poland
- Optegra Clinic in Warszawa, 02-366 Warszawa, Poland
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Yangzes S, Kaushik S, Malhotra C, Thakur A, Gupta A, Jain AK, Jinagal J, Pandav SS. Correlation of anterior segment optical coherence tomography and ultrasound biomicroscopy in congenital corneal opacity. J AAPOS 2024; 28:103863. [PMID: 38458600 DOI: 10.1016/j.jaapos.2024.103863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 11/22/2023] [Accepted: 11/30/2023] [Indexed: 03/10/2024]
Abstract
PURPOSE To investigate the correlation between swept-source anterior segment optical coherence tomography (AS-OCT) and ultrasound biomicroscopy (UBM) in congenital corneal opacity (CCO). METHODS All children with unilateral or bilateral congenital corneal opacities who underwent examination under anesthesia (EUA) and anterior segment optical coherence tomography (AS-OCT) imaging from January 1, 2022, to December 31, 2022, were included. Main outcome measures were corneal and anterior segment evaluation and correlation of UBM and AS-OCT findings. RESULTS A total of 22 eyes of 15 patients were imaged using both technologies. The age at first EUA ranged from 11 days to 4 years. Different phenotypes were classified based on the clinical examination, UBM, and AS-OCT findings. Fourteen eyes were diagnosed with Peters anomaly, congenital corneal staphyloma was observed in 4 eyes, 2 eyes had coloboma, 1 eye had peripheral sclerocornea, and 1 eye was diagnosed with congenital primary aphakia. AS-OCT and UBM findings were closely correlated in 18 of 22 eyes (82%) but AS-OCT failed to provide detailed information in 4 eyes (18%) where UBM revealed more details. CONCLUSIONS Although AS-OCT offers valuable preliminary data for initial assessment and counseling, it may not consistently provide precise assessments in all cases. Therefore, UBM should be considered for definitive evaluation.
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Affiliation(s)
- Sonam Yangzes
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
| | - Sushmita Kaushik
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Chintan Malhotra
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Anchal Thakur
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Amit Gupta
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Arun Kumar Jain
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Jitender Jinagal
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Surinder Singh Pandav
- Advanced Eye Centre, Department of Ophthalmology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
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Fang J, Xing A, Chen Y, Zhou F. SeqCorr-EUNet: A sequence correction dual-flow network for segmentation and quantification of anterior segment OCT image. Comput Biol Med 2024; 171:108143. [PMID: 38364662 DOI: 10.1016/j.compbiomed.2024.108143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 01/16/2024] [Accepted: 02/12/2024] [Indexed: 02/18/2024]
Abstract
The accurate segmentation of AS-OCT images is a prerequisite for the morphological details analysis of anterior segment structure and the extraction of clinical biological parameters, which play an essential role in the diagnosis, evaluation, and preoperative prognosis management of many ophthalmic diseases. Manually marking the boundaries of the anterior segment tissue is time-consuming and error-prone, with inherent speckle noise, various artifacts, and some low-quality scanned images further increasing the difficulty of the segmentation task. In this work, we propose a novel model called SeqCorr-EUNet with a dual-flow architecture based on convolutional gated recursive sequence correction for semantic segmentation and quantification of AS-OCT images. An EfficientNet encoder is employed to enhance the intra-slice features extraction ability of semantic segmentation flow. The sequence correction flow based on ConvGRU is introduced to extract inter-slice features from consecutive adjacent slices. Spatio-temporal information is fused to correct the morphological details of pre-segmentation results. And the channel attention gate is inserted into the skip-connection between encoder and decoder to enrich the contextual information and suppress the noise of irrelevant regions. Based on the segmentation results of the anterior segment structures, we achieved automatic extraction of essential clinical parameters, 3D reconstruction of the anterior chamber structure, and measurement of anterior chamber volume. The proposed SeqCorr-EUNet has been evaluated on the public AS-OCT dataset. The experimental results show that our method is competitive compared with the existing methods and significantly improves the segmentation and quantification performance of low-quality imaging structures in AS-OCT images.
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Affiliation(s)
- Jing Fang
- School of Computer Science and Information Engineering, Hefei University of Technology, Hefei, 230601, Anhui, China.
| | - Aoyu Xing
- School of Computer Science and Information Engineering, Hefei University of Technology, Hefei, 230601, Anhui, China.
| | - Ying Chen
- Department of Ophthalmology, Hospital of University of Science and Technology of China, Hefei, 230026, Anhui, China.
| | - Fang Zhou
- School of Computer Science and Information Engineering, Hefei University of Technology, Hefei, 230601, Anhui, China.
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Blanco-Elices C, Morales-Álvarez C, Chato-Astrain J, González-Gallardo C, Ávila-Fernández P, Campos F, Carmona R, Martín-Piedra MÁ, Garzón I, Alaminos M. Development of stromal differentiation patterns in heterotypical models of artificial corneas generated by tissue engineering. Front Bioeng Biotechnol 2023; 11:1124995. [PMID: 37034263 PMCID: PMC10076743 DOI: 10.3389/fbioe.2023.1124995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 03/16/2023] [Indexed: 04/11/2023] Open
Abstract
Purpose: We carried out a histological characterization analysis of the stromal layer of human heterotypic cornea substitutes generated with extra-corneal cells to determine their putative usefulness in tissue engineering. Methods: Human bioartificial corneas were generated using nanostructured fibrin-agarose biomaterials with corneal stromal cells immersed within. To generate heterotypical corneas, umbilical cord Wharton's jelly stem cells (HWJSC) were cultured on the surface of the stromal substitutes to obtain an epithelial-like layer. These bioartificial corneas were compared with control native human corneas and with orthotypical corneas generated with human corneal epithelial cells on top of the stromal substitute. Both the corneal stroma and the basement membrane were analyzed using histological, histochemical and immunohistochemical methods in samples kept in culture and grafted in vivo for 12 months in the rabbit cornea. Results: Our results showed that the stroma of the bioartificial corneas kept ex vivo showed very low levels of fibrillar and non-fibrillar components of the tissue extracellular matrix. However, in vivo implantation resulted in a significant increase of the contents of collagen, proteoglycans, decorin, keratocan and lumican in the corneal stroma, showing higher levels of maturation and spatial organization of these components. Heterotypical corneas grafted in vivo for 12 months showed significantly higher contents of collagen fibers, proteoglycans and keratocan. When the basement membrane was analyzed, we found that all corneas grafted in vivo showed intense PAS signal and higher contents of nidogen-1, although the levels found in human native corneas was not reached, and a rudimentary basement membrane was observed using transmission electron microscopy. At the epithelial level, HWJSC used to generate an epithelial-like layer in ex vivo corneas were mostly negative for p63, whereas orthotypical corneas and heterotypical corneas grafted in vivo were positive. Conclusion: These results support the possibility of generating bioengineered artificial corneas using non-corneal HWJSC. Although heterotypical corneas were not completely biomimetic to the native human corneas, especially ex vivo, in vivo grafted corneas demonstrated to be highly biocompatible, and the animal cornea became properly differentiated at the stroma and basement membrane compartments. These findings open the door to the future clinical use of these bioartificial corneas.
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Affiliation(s)
- Cristina Blanco-Elices
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Carmen Morales-Álvarez
- GENYO, Centre for Genomics and Oncological Research: Pfizer, University of Granada, Andalusian Regional Government, PTS Granada, Granada, Spain
- Department of Biochemistry and Molecular Biology III, Faculty of Medicine, University of Granada, Granada, Spain
| | - Jesús Chato-Astrain
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | | | - Paula Ávila-Fernández
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
| | - Fernando Campos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
| | - Ramón Carmona
- Department of Cell Biology, Faculty of Sciences, University of Granada, Granada, Spain
| | - Miguel Ángel Martín-Piedra
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- *Correspondence: Miguel Ángel Martín-Piedra, ; Ingrid Garzón,
| | - Ingrid Garzón
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
- *Correspondence: Miguel Ángel Martín-Piedra, ; Ingrid Garzón,
| | - Miguel Alaminos
- Tissue Engineering Group, Department of Histology, Faculty of Medicine, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria ibs.GRANADA, Granada, Spain
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Wang Y, Ma G, Gao G, Tao J, Cao W, Sun H, Ma F, Zhang Y, Wei Y, Tian M. Bioimaging of Dissolvable Microneedle Arrays: Challenges and Opportunities. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9758491. [PMID: 36034102 PMCID: PMC9368514 DOI: 10.34133/2022/9758491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 06/10/2022] [Indexed: 11/29/2022]
Abstract
The emergence of microneedle arrays (MNAs) as a novel, simple, and minimally invasive administration approach largely addresses the challenges of traditional drug delivery. In particular, the dissolvable MNAs act as a promising, multifarious, and well-controlled platform for micro-nanotransport in medical research and cosmetic formulation applications. The effective delivery mostly depends on the behavior of the MNAs penetrated into the body, and accurate assessment is urgently needed. Advanced imaging technologies offer high sensitivity and resolution visualization of cross-scale, multidimensional, and multiparameter information, which can be used as an important aid for the evaluation and development of new MNAs. The combination of MNA technology and imaging can generate considerable new knowledge in a cost-effective manner with regards to the pharmacokinetics and bioavailability of active substances for the treatment of various diseases. In addition, noninvasive imaging techniques allow rapid, receptive assessment of transdermal penetration and drug deposition in various tissues, which could greatly facilitate the translation of experimental MNAs into clinical application. Relying on the recent promising development of bioimaging, this review is aimed at summarizing the current status, challenges, and future perspective on in vivo assessment of MNA drug delivery by various imaging technologies.
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Affiliation(s)
- Yanni Wang
- Laboratory of Biologics and Biomaterials, College of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China
| | - Gehua Ma
- College of Computer Science and Technology, Zhejiang University, Hangzhou 310027, China
| | - Guangzhi Gao
- Laboratory of Biologics and Biomaterials, College of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China
| | - Ji Tao
- Human Phenome Institute, Fudan University, Shanghai 201203, China
| | - Wenzhao Cao
- Human Phenome Institute, Fudan University, Shanghai 201203, China
| | - Haohao Sun
- College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China
| | - Fengsen Ma
- Laboratory of Biologics and Biomaterials, College of Pharmacy, Zhejiang University of Technology, Hangzhou 310014, China
- Life Science Research Center, Frontier Crossing Institute, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yilong Zhang
- Engineering Research Center of Intelligent Sensing and System, Ministry of Education, Hangzhou 310023, China
- College of Computer Science and Technology, Zhejiang University of Technology, Hangzhou 310023, China
| | - Yen Wei
- Department of Chemistry and the Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 100084, China
| | - Mei Tian
- Human Phenome Institute, Fudan University, Shanghai 201203, China
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