Publications by authors named "Dennis Lam"

Myopia has ever-rising prevalence in the past few decades globally. Its pathogenesis is still not adequately elucidated especially at the signal transduction level. For the environmental risk factors, there is a large body of fragmented knowledge about the visual inputs for accommodation, myopiagenesis and emmetropization, with the latter two being essentially local processes.

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Two isogenic hiPSC lines, ZIPi013-B-1 and ZIPi013-B-2, were generated by CRISPR/Cas9-mediated indels in the TRPM4 gene of the previously published ZIPi013-B. TRPM4 belongs to the evolutionarily conserved family of transient receptor potential (TRP) channels. It is expressed ubiquitously and its activity is regulated by intracellular calcium binding, changes in membrane potential, phosphoinositide lipids in the plasma membrane and the local concentration of cytoplasmic ATP and ADP.

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Article Synopsis
  • New AI technologies can help doctors better manage glaucoma by improving how they screen and diagnose the disease, but there are challenges to overcome.* -
  • Creating AI programs is tough because they need a lot of data, but it can be hard to get good data and doctors might not trust them since they don't always show how they work.* -
  • Future improvements in AI might include protecting patient data and using smartphones more in healthcare, which could change how doctors help patients with glaucoma.*
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The emergence of generative artificial intelligence (AI) has revolutionized various fields. In ophthalmology, generative AI has the potential to enhance efficiency, accuracy, personalization and innovation in clinical practice and medical research, through processing data, streamlining medical documentation, facilitating patient-doctor communication, aiding in clinical decision-making, and simulating clinical trials. This review focuses on the development and integration of generative AI models into clinical workflows and scientific research of ophthalmology.

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Epidermal growth factor receptor (EGFR) is a transmembrane tyrosine kinase that is frequently modified by glycosylation post-translationally. In cancer, EGFR amplifications and hotspot mutations such as L858R that promote proliferation have been detected in a significant fraction of non-small cell lung carcinomas and breast adenocarcinomas. Molecular dynamic simulations suggested that glycosylation at asparagine residue 361 (N361) promotes dimerization and ligand binding.

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Background: In adult patients with high myopia (HM), progressive axial elongation poses a significant risk for the development of subsequent ocular complications that may lead to visual impairment. Effective strategies to reduce or prevent further axial elongation in highly myopic adult patients have not been available so far. Recent studies suggested that medically lowering intraocular pressure (IOP) may reduce axial elongation.

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Prcis: The combination of surgical peripheral iridectomy, goniosynechialysis, and goniotomy is a safe and effective surgical approach for advanced primary angle closure glaucoma without cataract.

Purpose: To evaluate the efficacy and safety of surgical peripheral iridectomy (SPI), goniosynechialysis (GSL), and goniotomy (GT) in advanced primary angle closure glaucoma (PACG) eyes without cataract.

Patients And Methods: A prospective multicenter observational study was performed for patients who underwent combined SPI, GSL, and GT for advanced PACG without cataract.

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Article Synopsis
  • The study examines the effectiveness of a combined eye surgery (phacoemulsification, goniosynechialysis, and goniotomy) for treating primary angle closure glaucoma in patients with cataracts, noting that success is not influenced by the severity of peripheral anterior synechiae.
  • It involved 304 eyes from 283 patients over around 12.5 months, showing a significant reduction in intraocular pressure (IOP) post-surgery across all severity groups, with no notable differences in success rates.
  • Although more severe peripheral anterior synechiae (270°≤PAS<360°) experienced increased instances of complications like hyphema, the overall results indicated that the combined procedure is effective regardless of PAS extent
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Purpose: To evaluate the associations of the TIE2 gene with diabetic retinopathy (DR) and diabetic macular edema (DME).

Methods: This study included a Chinese cohort of 285 non-proliferative DR patients and 433 healthy controls. The DR patients were classified further into those with or without DME.

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Purpose: Cadherin-17 (CDH17) is a calcium-dependent cell adhesion protein that is overexpressed in several adenocarcinomas, including gastric, colorectal, and pancreatic adenocarcinoma. High levels of CDH17 have been linked to metastatic disease and poor prognoses in patients with these malignancies, fueling interest in the protein as a target for diagnostics and therapeutics. Herein, we report the synthesis, in vitro validation, and in vivo evaluation of a CDH17-targeted Zr-labeled immunoPET probe.

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Purpose: To investigate the effectiveness and safety of phacogoniotomy versus phacotrabeculectomy (PVP) among patients with advanced primary angle-closure glaucoma (PACG) and cataracts.

Design: Multicenter, randomized controlled, non-inferiority trial.

Methods: A total of 124 patients (124 eyes) with advanced PACG and cataracts were enrolled, with 65 in the phacogoniotomy group and 59 in the phacotrabeculectomy group.

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Article Synopsis
  • * The review discusses the overlapping features of optic neuropathy caused by high myopia and glaucoma, emphasizing how these similarities complicate diagnosis and treatment for glaucoma suspects with high myopia.
  • * By analyzing structural and functional differences through various eye examination techniques, the review aims to improve understanding and management strategies for patients dealing with both high myopia and glaucoma.
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The coronavirus disease 2019 (COVID-19) pandemic caused by the severe acute respiratory syndrome coronavirus 2 was one of the most devastating public health issues in recent decades. The ophthalmology community is as concerned about the COVID-19 pandemic as the global public health community is, as COVID-19 was recognized to affect multiple organs in the human body, including the eyes, early in the course of the outbreak. Ophthalmic manifestations of COVID-19 are highly variable and could range from mild ocular surface abnormalities to potentially sight and life-threatening orbital and neuro-ophthalmic diseases.

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Article Synopsis
  • The development of minimally invasive glaucoma surgeries (MIGSs) aims to safely and effectively manage mild-to-moderate glaucoma with less trauma and quicker recovery.
  • These procedures work mainly by improving aqueous outflow and reducing fluid production in the eye.
  • Recent advancements in MIGS include new devices, revisiting past techniques for alternative uses, and exploring combined approaches and laser procedures to enhance treatment options.
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Purpose: To describe the optic nerve head (ONH) abnormalities in nonpathologic highly myopic eyes based on swept-source optical coherence tomography (OCT) and the relationship with visual field (VF).

Design: Secondary analysis from a longitudinal cohort study.

Methods: Highly myopic patients without myopic maculopathy of category 2 or higher were enrolled.

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Purpose: To report the outcomes of a 120-degree goniotomy (GT) with or without secondary intraocular lens (IOL) implantation in glaucoma following cataract surgery (GFCS).

Design: Prospective, observational study.

Methods: Pediatric patients with GFCS who underwent standalone 120-degree GT or 120-degree GT combined with secondary IOL implantation (GT+IOL) from March 2022 to August 2022 at the Zhongshan Ophthalmic Center were recruited.

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Purpose: To compare the efficacy and safety of 120-, 240-, and 360-degree goniotomy (GT) with or without phacoemulsification with intraocular lens implantation (PEI) for patients with primary open-angle glaucoma (POAG).

Design: Multicenter, retrospective, comparative, nonrandomized interventional study.

Methods: Patients diagnosed with POAG who underwent GT with or without PEI were included, and divided into 6 groups: 1) standalone 120-degree GT (120GT); 2) standalone 240-degree GT (240GT); 3) standalone 360-degree GT (360GT); 4) PEI + 120GT; 5) PEI + 240GT; and 6) PEI + 360GT.

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Article Synopsis
  • The study aimed to create and validate a specialized database to help differentiate between high myopia (HM) and highly myopic glaucoma (HMG) by measuring the thickness of the peripapillary retinal nerve fiber layer (pRNFL).
  • It involved 1367 participants, analyzing pRNFL thickness using advanced optical coherence tomography (OCT) and included robust quality control measures to ensure reliability in results.
  • The findings showed that the HM-specific normative database could accurately detect HMG, achieving high accuracy and specificity rates, especially when using the fifth percentile as a threshold for pRNFL thickness.
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Prcis: Goniotomy (GT) 120 degrees with or without phacoemulsification was sufficient to lower the intraocular pressure (IOP) and reduce hyphema for primary open angle glaucoma.

Purpose: To compare the surgical outcomes and safety profiles of 120 degrees and 360 degrees GT with or without phacoemulsification cataract extraction and intraocular lens implantation (PEI) for primary open angle glaucoma.

Patients And Methods: This multicenter retrospective study consisted of 139 eyes and was divided into 4 groups: (1) 120 degrees GT, (2) 360 degrees GT, (3) PEI + 120 degrees GT, and (4) PEI + 360 degrees GT.

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Frequent antivascular endothelial growth factor injections in neovascular age-related macular degeneration (nAMD) often lead to poor compliance and suboptimal outcomes. A longer-acting agent has been a pressing unmet need until recently. Brolucizumab, an antivascular endothelial growth factor agent, is a single-chain antibody fragment approved by the US Food and Drug Administration (FDA) on October 8, 2019, for treating nAMD.

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