Publications by authors named "Boey Pui Yi"

Purpose: To describe the long-term outcomes of phacotrabeculectomy from a tertiary glaucoma service in Singapore.

Design: Retrospective case series.

Methods: Seven hundred ninety-six eyes of 698 patients who underwent phacotrabeculectomy surgery at the Singapore National Eye Centre between 2005 and 2007 with a minimum follow-up of three years were included.

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Prcis: Individuals prescribed ibuprofen after trabeculectomy have better postoperative intraocular pressure (IOP) control and a higher chance of bleb survival despite being at a higher risk of scarring.

Purpose: To investigate the effects of early adjunctive oral ibuprofen treatment on IOP and bleb failure in eyes at high risk of scarring.

Methods: In these retrospective analyses, 288 eyes of 273 patients (mean ± SD age: 68.

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Background: Glaucoma and chronic kidney disease (CKD) are prevalent and debilitating conditions, with common pathogenic pathways like oxidative stress and fluid dysregulation. We evaluated if there is a bidirectional association between them, as previous studies have yielded conflicting results.

Methods: In this systematic review and meta-analysis, we searched PubMed, Embase and Cochrane Library from inception until 15 June 2021, including full-length English articles published in peer-reviewed journals reporting on glaucoma and CKD as either exposure or outcome, among participants aged ≥18 years.

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Background: Much has been written on infection control and clinical measures for ophthalmic institutions and departments to cope with the COVID-19 pandemic. However, few articles have detailed implementation plans to manage lockdowns and subsequent re-openings. In this article, specific operational responses and their outcomes in a large tertiary ophthalmology centre are described.

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Prcis: Reduction of intraocular pressure (IOP) by latanoprost in treatment-naive eyes is significantly correlated to an increase in vessel density (VD) at the optic nerve head (ONH).

Purpose: To evaluate the effect of topical latanoprost on ocular microvasculature using optical coherence tomography angiography (OCTA).

Patients And Methods: In this prospective case-control study, 26 eyes from 18 treatment-naive subjects in whom prostaglandin analogue (PGA) latanoprost 0.

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Purpose: To evaluate the effect of signal strength (SS) on optical coherence tomography (OCT) parameters, and devise an algorithm to adjust the effect, when acceptable SS cannot be obtained.

Methods: 5085 individuals (9582 eyes), aged ≥40 years from the Singapore Epidemiology of Eye Diseases population-based study were included. Everyone underwent a standardised ocular examination and imaging with Cirrus HD-OCT.

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Purpose: To investigate whether recently identified genetic loci for primary angle-closure glaucoma (PACG) are associated with disease severity.

Design: Case-control study.

Participants: Eight hundred four PACG patients and 943 control participants of Chinese ethnicity from Singapore.

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Purpose: The purpose of this study was to investigate whether the addition of primary angle closure glaucoma (PACG)-associated genetic loci allows improved detection of PACG, compared to anterior segment parameters measured by imaging.

Design: Case-control study.

Methods: Genotype data of the 8 PACG single-nucleotide polymorphisms (SNPs) (rs11024102 at PLEKHA7, rs3753841 at COL11A1, rs1015213 located between PCMTD1 and ST18 on Chromosome 8q, rs3816415 at EPDR1, rs1258267 at CHAT, rs736893 at GLIS3, rs7494379 at FERMT2, and rs3739821 mapping in between DPM2 and FAM102A) were available.

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Purpose: To evaluate the corneal endothelial characteristics across the primary angle closure (PAC) disease spectrum amongst patients diagnosed as PAC suspects (PACS), PAC, PAC glaucoma (PACG), and previous acute PAC (APAC).

Methods: We analyzed a total of 529 subjects (51 PACS, 170 PAC, 234 PACG, and 74 with previous APAC). All subjects had undergone laser peripheral iridotomy prior to study recruitment.

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Purpose: To investigate whether newly identified genetic loci for primary angle-closure glaucoma (PACG) are associated with early stage angle-closure disease defined as primary angle closure suspect (PACS).

Design: Case-control study.

Participants: A total of 1397 PACS patients and 943 controls of Chinese ethnicity from Singapore and 604 PACS patients and 287 controls of Indian ethnicity.

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Purpose: Minimum rim width (MRW) and area (MRA) have been introduced as anatomically defensible measures of neuroretinal rim tissue observable using spectral-domain optical coherence tomography (SDOCT). They have been reported to change earlier than retinal nerve fiber layer thickness (RNFLT) in glaucoma. This study sought to determine which is better to distinguish subsequent change from variability, using the previously described longitudinal signal-to-noise ratio (LSNR).

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Aim: To describe the outcomes of bleb needling in primary glaucoma in an Asian tertiary eye centre over a 2y period. To compare the success rates between primary angle-closure glaucoma (PACG) and primary open angle glaucoma (POAG). Lastly, to identify factors associated with success of bleb needling.

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Ocular hypertension is a common and important problem seen by eye care providers. This review presents a practical approach to individuals with ocular hypertension. It describes the common functional and structural investigations used in evaluation, as well as the advantages and disadvantages of each test.

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Purpose: To describe the associations of myopia and axial length (AL) with age-related cataract in an Asian population in Singapore.

Methods: A population-based cross-sectional study that examined 3280 (78.7% response) adults of Malay ethnicity aged 40 to 80 years.

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The management of acute primary angle closure is directed at lowering the intraocular pressure and relieving pupil block. Conventional treatment involves the use of medical treatment and laser peripheral iridotomy, respectively, as a means for achieving these aims. Newer therapeutic strategies have been described that are potentially useful adjuncts or alternatives to conventional treatment.

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Purpose: To compare the outcomes of trabeculectomy surgery after Descemet stripping automated endothelial keratoplasty (DSAEK) to penetrating keratoplasty (PK).

Design: Retrospective case-control study.

Methods: Patients within an institutional setting who underwent trabeculectomy with mitomycin C (MMC) for uncontrolled elevated intraocular pressure (IOP) after corneal graft surgery were included.

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Purpose: To determine the efficacy of a subconjunctival injection of hyaluronic acid (HA) with 5-fluorouracil (5FU) formulation as an adjunct in reviving bleb function by needling.

Design: Prospective, randomized, controlled trial.

Participants: Fifty patients with previous trabeculectomy and scheduled by the managing physician for a needling intervention.

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Purpose: To determine the tear cytokine profile from medicated glaucoma patients scheduled for trabeculectomy and to establish whether a specifically elevated cytokine level is related to early postoperative scarring.

Design: Prospective case-control study.

Participants: Sixty-one patients treated with topical antiglaucoma medications and 29 normal subjects with no prior topical treatment were recruited for the study.

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Purpose. To describe associations between C-reactive protein (CRP) and age-related macular degeneration (AMD) and cataract in an Asian population. Methods.

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Aim: To report a case series of patients who had manifestation or aggravation of thyroid related orbitopathy (TRO) following cataract surgery in an Asian eye centre.

Methods: A systematic review of clinical records of patients with manifestation or aggravation of TRO was conducted. Inclusion criteria were manifestation or aggravation of TRO within 6 months of cataract surgery.

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Introduction: The Optic Neuritis Treatment Trial (ONTT) has established that the magnetic resonance imaging (MRI) findings at the time of presentation of optic neuritis (ON) is the strongest indicator of the development of multiple sclerosis (MS). Reports from Singapore as well as other Asian countries have indicated that these abnormalities are less frequently encountered compared to that reported by the ONTT. This paper aims to describe systematically the brain MRI as well as the optic nerve abnormalities in patients after an episode of acute optic neuritis.

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