Publications by authors named "Alison Chan"

Background: The purpose of this study was to compare the outcomes of 2 types of tarsoconjunctival pedicle flaps for reconstruction of large lower eyelid defects.

Methods: The authors performed a retrospective medical record review of consecutive patients who underwent centrally or laterally based tarsoconjunctival pedicle transconjunctival flap for lower eyelid reconstruction for defects greater than 50% of the lid margin. Full-thickness skin grafts were used for anterior lamellar reconstruction in all cases.

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  • * Researchers conducted a case-control study, comparing individuals with atrial fibrillation to age- and sex-matched controls, and found a higher occurrence of RIPLs in those with atrial fibrillation (57.5% vs. 37.4%).
  • * The results suggest that RIPLs are significantly associated with atrial fibrillation even when accounting for other heart disease risk factors, indicating that the presence of RIPLs could be relevant in evaluating cardiovascular health in patients.
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  • The study aimed to check if gene expression profile (GEP) testing is useful for predicting outcomes in uveal melanoma patients and whether combining tumor size with GEP classification adds value to prognosis.
  • Data from 337 patients with choroidal melanoma were analyzed to find the link between tumor characteristics and risk of metastasis.
  • Results showed that larger tumor size and GEP class 2 were associated with higher metastasis risk, with tumor thickness being a more reliable prognostic factor than GEP classification.
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Background: The endosomal-lysosomal and autophagy (ELA) pathway may be implicated in the progression of Alzheimer's disease (AD); however, findings thus far have been inconsistent.

Objective: To systematically summarize differences in endosomal-lysosomal and autophagy proteins in the cerebrospinal fluid (CSF) of people with AD and healthy controls (HC).

Methods: Studies measuring CSF concentrations of relevant proteins in the ELA pathway in AD and healthy controls were included.

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Purpose: To assess for risk factors for retinal vein occlusion (RVO) among participants in the National Institutes of Health database, particularly social risk factors that have not been well studied, including substance use.

Design: Retrospective, case-control study.

Participants: Data were extracted for 380 adult participants with branch retinal vein occlusion (BRVO), 311 adult participants with central retinal vein occlusion (CRVO), and 1520 controls sampled among 311 640 adult participants in the database.

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Purpose: Inadequacies in healthcare access and utilization substantially impact outcomes for diabetic patients. The All of Us database offers extensive survey data pertaining to social determinants that is not routinely available in electronic health records. This study assesses whether social determinants were associated with an increased risk of developing proliferative diabetic retinopathy or related complications (e.

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Purpose: To quantify and characterize social determinants of health (SDoH) data coverage using single-center electronic health records (EHRs) and the National Institutes of Health All of Us research program.

Design: Retrospective cohort study from June 2014 through June 2021.

Participants: Adults 18 years of age or older with a diagnosis of diabetic retinopathy, glaucoma, cataracts, or age-related macular degeneration.

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Purpose: Polymorphous low-grade adenocarcinoma is a tumor of the salivary glands that typically localizes within the oral cavity. We present a case of isolated third cranial nerve palsy as the initial presentation of polymorphous low-grade adenocarcinoma involving the left cavernous sinus in a patient status post glaucoma surgery.

Observations: A 68-year-old woman status post glaucoma drainage device implantation in her left eye presented with an isolated left third nerve palsy ten weeks postoperatively.

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Purpose: To identify common factors associated with the loss of an eye using the NIH All of Us database.

Methods: In this case-controlled study, we extracted electronic health record and socio-demographic data for 231 cases of eye loss from All of Us enrollment sites. Controls (N = 924) matched the demographic characteristics of the 2020 United States Census.

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Several studies have reported exposure of humans to various endocrine disrupting chemicals (EDCs) worldwide. However, there is a lack of data regarding EDC exposures in humans living in Southeast Asian countries, such as the Philippines. Hence, this study measured levels of 41 EDCs in women residing in the Greater Manila Area, home to the second largest city in Southeast Asia.

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Background: Cardiovascular disease is the leading cause of mortality and disability worldwide. A noninvasive test that can detect underlying cardiovascular disease has the potential to identify patients at risk prior to the occurrence of adverse cardiovascular events. We sought to determine whether an easily observed imaging finding indicative of retinal ischemia, which we term ' (RIPLs), could serve as a biomarker for cardiovascular disease.

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Purpose: To evaluate the prevalence of meibomian gland dysfunction (MGD) among ophthalmic healthcare workers.

Setting: A tertiary ophthalmic center.

Design: Prospective, observational study.

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Purpose: To examine the association between cognitive dementia and retinal vascular occlusions.

Design: A retrospective, cross-sectional study.

Methods: Single-institution study population: we reviewed the electronic medical records of 37,208 individuals older than 65 years of age who were evaluated by an ophthalmologist or an optometrist and who also had a medical visit to our institution over a 6-year period.

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Purpose: The purpose of this study was to evaluate the ability to align two types of retinal images taken on different platforms; color fundus (CF) photographs and infrared scanning laser ophthalmoscope (IR SLO) images using mathematical warping and artificial intelligence (AI).

Methods: We collected 109 matched pairs of CF and IR SLO images. An AI algorithm utilizing two separate networks was developed.

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Purpose: To report use of ultrasound biomicroscopy (UBM) and anterior segment ocular coherence tomography (AS-OCT) in a case of pseudophakic glaucoma in a patient with an anterior chamber intraocular lens.

Observations: UBM and AS-OCT were critical in determining a non-drug related etiology of angle closure. Images indicated anterior obstruction of the pupil secondary to anterior chamber intraocular lens, but also posterior obstruction of the pupil secondary to the anterior hyaloid face.

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Background: Silicone oil insertion is a common modality in vitreoretinal surgeries. The purpose of this study is to conduct a systematic review to summarize the uncommon complication of extraocular silicone oil migration.

Methods: Following the PRISMA guidelines, a systematic review of the literature was performed on January 11, 2020, using PubMed and EMBASE with the following terms: "silicone oil," "eye," and "migrat*.

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Aims: To compare the intraocular pressure (IOP) lowering effect and safety profile between pattern scanning laser trabeculoplasty (PSLT) and selective laser trabeculoplasty (SLT) in patients with primary open-angle glaucoma (POAG) or ocular hypertension (OHT) over a 12-month follow-up.

Methods: 132 patients with POAG or OHT were consecutively enrolled and randomised (1:1) to receive PSLT (n=65) or SLT (n=67) in a single centre. IOP was measured before and then on 1 day, 1 week, 1, 3, 6, 9 and 12 months after PSLT/SLT.

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Biobanking has become an indispensable tool for translational research and health innovations. While the field of biobanking has progressed and evolved globally, biobanking in developing Association of Southeast Asian Nations (ASEAN) countries such as the Philippines remains underrepresented because of several challenges often encountered in these low- and middle-income countries. Recently, the Philippine government has undertaken enormous efforts to advancing research and development in the country, and one of the current research pursuits is the establishment of biobanks, with the hope of attaining more discoveries and innovations in the future.

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, the only known freshwater sardinella in the world, is endemic to Taal Lake, Philippines. Previous studies found the Taiwan sardinella, , to be morphologically very similar to and identified it as the marine sister species of . In this study, DNA barcoding using the mitochondrial cytochrome oxidase I (COI) gene was carried out to analyze species demarcation in the genus, focusing primarily on the relationship between and .

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Falls are a major health-care concern, and while dual-task performance is widely recognized as being impaired in those at-risk for falls, the underlying neurocognitive mechanisms remain unknown. A better understanding of the underlying mechanisms could lead to the refinement and development of behavioral, cognitive, or neuropharmacological interventions for falls prevention. Therefore, we conducted a cross-sectional study with community-dwelling older adults aged 70-80 years with a history of falls (i.

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Introduction: Current research suggests that the neuropathology of dementia-including brain changes leading to memory impairment and cognitive decline-is evident years before the onset of this disease. Older adults with cognitive decline have reduced functional independence and quality of life, and are at greater risk for developing dementia. Therefore, identifying biomarkers that can be easily assessed within the clinical setting and predict cognitive decline is important.

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