Contribution of systemic factors on macular vessel density: a sex-specific population-based study.

Purpose: To evaluate the influence of systemic factors on macular vessel density in quantitative Optical Coherence Tomography Angiography (OCTA) by sex.

Study Design: A cross-sectional study.

Methods: A total of 2018 adults were recruited in this study.

Six-Year Outcomes in Subjects with Polypoidal Choroidal Vasculopathy in the EVEREST II Study.

Introduction: The EVEREST II study previously reported that intravitreally administered ranibizumab (IVR) combined with photodynamic therapy (PDT) achieved superior visual gain and polypoidal lesion closure compared to IVR alone in patients with polypoidal choroidal vasculopathy (PCV). This follow-up study reports the long-term outcomes 6 years after initiation of the EVEREST II study.

Methods: This is a non-interventional cohort study of 90 patients with PCV from 16 international trial sites who originally completed the EVEREST II study.

Circulating Tumor DNA Dynamics as Prognostic Markers in Locally Advanced and Metastatic Esophageal Squamous Cell Carcinoma.

Importance: Esophageal squamous cell carcinoma (ESCC) is a deadly disease with frequent recurrence. There are unmet needs for prognostic biomarkers for dynamically monitoring disease progression and detecting minimal residual disease.

Objective: To examine whether circulating tumor DNA is clinically useful as a prognostic biomarker for ESCC recurrence and patient survival.

OCTA biomarkers in adults aged 50 and above: a prospective and cross-sectional community-based study.

Background/aims: To assess the normative values and parameters of optical coherence tomography angiography (OCTA) influencing the best corrected visual acuity (BCVA) in adults aged 50 and above.

Methods: This was a prospective cross-sectional study from an eye screening programme in Hong Kong for 4188 citizens aged 50 and above. Images were analysed using a validated quantification software calculating vessel density and capillary perfusion density (CPD), along with other OCTA parameters, such as the foveal avascular zone area (FAZ) and circularity.

Regression-Based Strategies to Reduce Refractive Error-Associated Glaucoma Diagnostic Bias When Using OCT and OCT Angiography.

Purpose: The purpose of this study was to correct refractive error-associated bias in optical coherence tomography (OCT) and OCT angiography (OCTA) glaucoma diagnostic parameters.

Methods: OCT and OCTA imaging were obtained from participants in the Hong Kong FAMILY cohort. The Avanti/AngioVue OCT/OCTA system was used to measure the peripapillary nerve fiber layer thickness (NFLT), peripapillary nerve fiber layer plexus capillary density (NFLP-CD), macular ganglion cell complex thickness (GCCT), and macular superficial vascular complex vascular density (SVC-VD).

A Novel Tumor Staging System Incorporating Tumor Regression Grade (TRG) With Lymph Node Status (ypN-Category) Results in Better Prognostication Than ypTNM Stage Groups After Neoadjuvant Therapy for Esophageal Squamous Cell Carcinoma.

Objective: This study aims at constructing a staging system incorporating tumor regression grade and ypN-category (TRG-N) in patients with neoadjuvant therapy before esophagectomy. It is hypothesized that this would prognosticate better than the current American Joint Committee on Cancer (AJCC) postneoadjuvant therapy (ypTNM) stage groups.

Background: Conventional pathological T-category is defined by the depth of invasion, and may lose prognostic relevance after neoadjuvant therapy.

Autophagic Upregulation Is Cytoprotective in Ischemia/Reperfusion-Injured Retina and Retinal Progenitor Cells.

The cytoprotective versus cytotoxic role of macroautophagy in ocular ischemia/reperfusion injuries remains controversial and its effects under hyperglycemia are unclear. We investigated the involvement of autophagy in in vitro and in vivo normoglycemic and hyperglycemic models of retinal ischemia/reperfusion injury. Retinal ischemia (2 h) and reperfusion (2 or 22 h) was induced in wild-type and type I diabetic Ins2 mice using a middle cerebral artery occlusion model.

Improving Outcome of Superior Mediastinal Lymph Node Dissection During Esophagectomy: A Novel Approach Combining Continuous and Intermittent Recurrent Laryngeal Nerve Monitoring.

Objective: This study aimed at demonstrating the effects and learning curve of utilizing combined intermittent and continuous recurrent laryngeal nerve (RLN) monitoring for lymphadenectomy during esophagectomy.

Background: RLN lymphadenectomy is oncologically important but is technically demanding. Vocal cord (VC) palsy as a result from RLN injury, carries significant morbidities.

Transcervical Transtracheal Resection of Cervical Esophageal Smooth Muscle Tumor.

Cervical esophageal smooth muscle tumors are traditionally resected via lateral transcervical with or without video-assisted thoracoscopic approaches. Exposure is frequently limited, however, with risks of recurrent laryngeal nerve and posterior tracheal wall injury and jeopardization of cervical tracheal and cervical esophageal blood supply. We herein describe an anterior transcervical transtracheal approach to counter some of the aforementioned problems and avoid morbidities associated with thoracoscopic surgery when resecting smooth muscle tumors arising from the cervical esophagus.

One-year results of intravitreal conbercept in treatment-naïve subjects with polypoidal choroidal vasculopathy.

Purpose: To evaluate the functional and structural outcomes of intravitreal conbercept monotherapy using a "3 + pro re nata (PRN)" regimen in treatment-naïve subjects with polypoidal choroidal vasculopathy (PCV) up to 12 months.

Methods: Thirty subjects (30 eyes) with PCV participated in this interventional, retrospective study. All subjects received intravitreal injections of 0.

Incorporating Optical Coherence Tomography Macula Scans Enhances Cost-effectiveness of Fundus Photography-Based Screening for Diabetic Macular Edema.

Objective: To compare four screening strategies for diabetic macular edema (DME).

Research Design And Methods: Patients attending diabetic retinopathy screening were recruited and received macular optical coherence tomography (OCT), in addition to visual acuity (VA) and fundus photography (FP) assessments, as part of the standard protocol. Two retina specialists provided the reference grading by independently assessing each subject's screened data for DME.

Computed tomography-based deep-learning prediction of neoadjuvant chemoradiotherapy treatment response in esophageal squamous cell carcinoma.

Background: Deep learning is promising to predict treatment response. We aimed to evaluate and validate the predictive performance of the CT-based model using deep learning features for predicting pathologic complete response to neoadjuvant chemoradiotherapy (nCRT) in esophageal squamous cell carcinoma (ESCC).

Materials And Methods: Patients were retrospectively enrolled between April 2007 and December 2018 from two institutions.

Neoadjuvant Chemoradiotherapy Using Cisplatin and 5-Fluorouracil (PF) Versus Carboplatin and Paclitaxel (CROSS Regimen) for Esophageal Squamous Cell Carcinoma (ESCC): A Propensity Score-matched Study.

Objective: This study compared the efficacy of PF-based and CROSS-based neoadjuvant chemoradiotherapy for ESCC.

Background: PF-based regimen has been a standard regimen for ESCC, but it has been replaced by the CROSS regimen in the past few years, despite no prospective head-to-head comparative study has been performed.

Methods: This is a single center retrospective study.

Possible Modifying Effect of Hemoglobin A1c on Genetic Susceptibility to Severe Diabetic Retinopathy in Patients With Type 2 Diabetes.

Purpose: Glycemic control has been recognized as an important modifiable risk factor for diabetic retinopathy (DR). Whether hemoglobin A1c (HbA1c), as an indicator of glycemic control, could modify the genetic susceptibility to severe DR remains to be investigated. This study aimed to investigate whether HbA1c could modulate the genetic susceptibility to severe DR in Chinese patients with type 2 diabetes.

Real-world Scenario: CROSS Regimen as Preoperative Therapy for Oesophageal Squamous Cell Carcinoma.

Background: Preoperative chemoradiation (CROSS regimen) has been widely adopted worldwide. The survival advantage imparted is especially impressive for oesophageal squamous cell carcinoma (OSCC). This study aimed at investigating the efficacy of the CROSS regimen in real-world scenario.

Prevalence and Causes of Visual Impairment and Blindness among Adult Chinese in Hong Kong - The Hong Kong Eye Study.

Purpose: To investigate the prevalence, associations, and causes of visual impairment and blindness in the adult population of Hong Kong.

Methods: This cross-sectional population-based study included 2018 (870, 43% male) randomly selected adults with a mean age 52 ± 16 years (range 18-90 years) in Hong Kong. Each participant underwent comprehensive ophthalmic examinations.

Treatment of large, chronic and persistent macular hole with internal limiting membrane transposition and tuck technique.

Background: Large, chronic full thickness macular holes which failed previous treatments are difficult to manage and even left untreated due to poor prognosis. A retrospective review of consecutive cases with chronic (at least 1 year) full thickness macular holes and internal limiting membrane (ILM) free flap transposition with tuck technique, after previously failed vitrectomy.

Methods: This was a retrospective and interventional study conducted in a single centre by a single surgeon.

Prevalence and associations of myopia in Hong Kong primary school students.

Purpose: To examine the prevalence of myopia in primary school children in Hong Kong, and the risk factors for myopia development.

Study Design: A cross-sectional study.

Methods: Subjective refraction and axial length were measured in all participants.

Exophthalmometry values in the Hong Kong Chinese adult population from a population-based study.

This study aims to establish the range of exophthalmometry values (EV) in the adult Hong Kong (HK) Chinese population, its relationship with various anthropometric parameters, and to compare it with the EV in different ethnic groups.About 1485 adult HK Chinese were drawn from a random sample from the community-based FAMILY Cohort. Participants were interviewed, and comprehensive ophthalmological assessments were conducted.

Macular Vessel Density Measured With Optical Coherence Tomography Angiography and Its Associations in a Large Population-Based Study.

Purpose: We investigate macular perfusion and the systemic and ocular associations in a population-based setting.

Methods: In this cross-sectional study, 2018 adults residing in Hong Kong underwent detailed ophthalmic examinations after consenting to participate. Macular perfusion was measured with optical coherence tomography angiography (OCTA) using the split-spectrum amplitude decorrelation angiography algorithm.

Corneal Biomechanics Using a Scheimpflug-Based Noncontact Device in Normal-Tension Glaucoma and Healthy Controls.

Purpose: To determine if a novel biomechanical parameter, corneal applanation velocity, as measured by the Corvis ST, is associated with a diagnosis of normal-tension glaucoma (NTG).

Design: Prospective, cross-sectional study.

Methods: Study and control subjects were recruited from the ophthalmology clinic of a university teaching hospital in Hong Kong over an 8-week period in 2013.

Optic neuritis as the initial clinical presentation of limbic encephalitis: a case report.

Background: Limbic encephalitis is characterized by rapid onset of working memory deficit, mood changes, and often seizures. The condition has a strong paraneoplastic association, but not all cases are invariably due to tumors.

Case Presentation: We present a case of limbic encephalitis in a Chinese patient who initially presented to our hospital with optic neuritis and no other neurological symptoms.

Saving sight in China and beyond: the Lifeline Express model.

Cataract and diabetic retinopathy are leading causes of blindness globally. Lifeline Express (LEX) has pioneered the provision of cataract surgery in rural China from custom-built trains and eye centres nationwide. Over the past two decades, LEX has provided free cataract surgery for over 180 000 patients in China.

Injectable silicone rubber for ocular implantation after evisceration.

Objective: To investigate the usefulness of addition type liquid silicone rubber (ATLSR) as injectable implant after evisceration to maintain the eyeball volume in an animal experiment.

Methods: Twelve adult New Zealand white rabbits were included. One eye of each rabbit was randomly selected for evisceration with the fellow eye as control.