Publications by authors named "Hamish Dunn"

Purpose: To compare safety, effectiveness, and baseline predictors of failure in standalone primary Xen45 gel stent (Xen) versus trabeculectomy (Trab) in glaucoma.

Design: Retrospective study.

Subjects: Subjects that underwent primary Xen or Trab augmented by mitomycin-C with at least 12 months follow-up.

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Clinical Relevance: Well-targeted referrals and timely commencement of treatment are essential to limiting vision loss in glaucoma. Optometrists, primary care providers, and public health policymakers can utilise predictors of late to identify and target at-risk populations.

Background: This study, which aimed to evaluate glaucoma severity at first presentation to an ophthalmologist in a rural Australian population, is the first of its kind in an Australian population.

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Objective: To evaluate efficacy and safety outcomes of the Xen 45 gel stent implant over 24 months of follow-up.

Methods: A retrospective analysis of prospectively collected data from the Fight Glaucoma Blindness observational registry. Complete success (CS) was defined as intraocular pressure (IOP) reduction ≥20% from preoperative and an IOP ≤18 mm Hg and ≥6 mm Hg with no secondary procedure at 2 years and without IOP-lowering medications.

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Introduction: The aim of this study was to determine the prevalence of diabetic retinopathy (DR) in a low socioeconomic region of a high-income country, as well as determine the diagnostic utility of point-of-care screening for high-risk populations in tertiary care settings.

Research Design And Methods: This was a cross-sectional study of patients with diabetes attending foot ulcer or integrated care diabetes clinics at two Western Sydney hospitals (n=273). DR was assessed using portable, two-field, non-mydriatic fundus photography and combined electroretinogram/ pupillometry (ERG).

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Prcis: This systematic review has revealed that variable definitions of glaucoma continue to be used in prevalence studies, despite the introduction of the International Society of Geographic and Epidemiologic Ophthalmology (ISGEO) criteria.

Purpose: To systematically review diagnostic criteria and examinations performed in glaucoma prevalence studies over time and determine the quality of reporting. Accurate estimates of glaucoma prevalence are crucial to inform resource allocation.

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Introduction: Fundoscopy can be of great clinical value, yet remains underutilised. Educational attempts to improve fundoscopy utilisation have had limited success. We aimed to explore the barriers and facilitators underlying the uptake of clinical direct ophthalmoscopy across a spectrum of medical specialties and training levels.

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This report describes the unusual case and surgical repair of avulsion and external herniation of the levator palpebrae superioris (LPS) aponeurosis and attached muscle fibres associated with superior tarsal plate fracture in an 8-year-old Indigenous girl. To the authors' knowledge, isolated and complete levator palpebrae superioris avulsion with external herniation in trauma is previously unreported. Open injury to LPS requires swift surgical repair, and an anterior ptosis repair approach may facilitate identification of anatomical structures to prevent upper eyelid ptosis.

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Tuberculosis (TB) causes significant morbidity and mortality worldwide. Ocular manifestations of TB can lead to severe and sight-threatening complications. Initiating treatment in ocular TB with anti-tubercular therapy (ATT) may be necessary to prevent long-term visual complications.

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Background And Purpose: Although fundoscopy is a crucial part of the neurological examination, it is challenging, under-utilized and unreliably performed. The aim was to determine the prevalence of fundus pathology amongst neurology inpatients and the diagnostic accuracy of current fundoscopy practice compared with systematic screening with smartphone fundoscopy (SF) and portable non-mydriatic fundus photography (NMFP).

Methods: This was a prospective cross-sectional surveillance and diagnostic accuracy study on adult patients admitted under neurology in an Australian hospital.

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Glaucoma is a chronic optic neuropathy that creates a significant burden on public health. Oxidative stress is hypothesized to play a role to glaucoma progression, and its reduction is being analyzed as a therapeutic target. Dietary antioxidants play a crucial role in helping provide insight into this hypothesis.

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Objective: To investigate the management impact of non-mydriatic fundus photography (NMFP) implementation for appropriate ED patients; compare the diagnostic accuracy of direct ophthalmoscopy (DO) and NMFP, and determine the prevalence of fundus pathology in a regional Australian ED.

Methods: This before/after crossover study prospectively enrolled patients presenting with headache, neurological deficit, visual disturbance and/or hypertensive urgency. Patients received DO examination, then separate NMFP examination.

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Introduction: Worldwide, tuberculosis is the leading cause of death from an infectious disease. Ocular involvement can cause significant and permanent vision loss. Ocular manifestations of tuberculosis often present with visual symptoms.

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Background: Ophthalmoscopy and its interpretation are complex. We aimed to compare the diagnostic accuracy of smartphone fundoscopy with traditional direct ophthalmoscopy for optic disc interpretation, with e-learning support.

Methods: We conducted a randomised, crossover study of 102 medical students.

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Objective: To determine the prevalence of fundus pathology in metropolitan Australian EDs utilising a non-mydriatic fundus photography screening programme. Secondary objectives include diagnostic accuracy among emergency physicians compared to telehealth ophthalmologist review.

Methods: Prospective cross-sectional study investigating non-mydriatic fundus photography as a new diagnostic test in two tertiary Australian EDs.

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Eye disease due to pachymeningitis caused by immunoglobulin G4-related disease (IgG4-RD) is a rare occurrence. Here, the authors report a unique case of a patient presenting with visual loss from raised intracerebral pressure from pachymeningitis most likely related to IgG4-RD. The patient was treated with acetazolamide and steroids, and an optic nerve sheath fenestration was performed to successfully save the patients vision.

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Aim: To determine the risk of ocular complications of sildenafil therapy in neonates.

Methods: Retrospective case review of neonates with persistent pulmonary hypertension of the newborn who received sildenafil therapy between 2010 and 2015 in a single, tertiary surgical neonatal intensive care unit in Australia. Ophthalmic examination findings in the neonatal intensive care unit and follow-up were examined.

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Background: This study aims to explore patient perspectives regarding their journey to glaucoma care and sought to understand the determinants that guide their access to tertiary glaucoma care.

Methods: Twenty-nine patients who are glaucoma suspects or had definitive diagnosis of glaucoma were recruited from a large public glaucoma clinic and a private ophthalmology clinic in Sydney. Face-to-face, in-depth semi-structured interviews were conducted between April and December 2017.

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Importance: Patient perspectives are crucial in informing design of acceptable services.

Background: This study determined patient preferences in glaucoma care.

Design: A discrete choice experiment was used to evaluate the relative importance of out-of-pocket costs, waiting time, continuity of care, service location and expertise.

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Inferior rectus avulsion following blunt trauma is rare, with even fewer reported cases of complete transection. The authors report a case of orbital floor fracture and inferior rectus muscle transection without herniation following blunt orbital trauma. This case first highlights the difficulty in diagnosing complete inferior rectus muscle transection clinically and with imaging and second that an acceptable functional outcome can be achieved by a novel surgical repair approach utilizing contiguous orbital anatomical relations of the inferior oblique and inferior rectus muscles.

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We describe a case of choroidal melanoma initially presenting with orbital cellulitis, fulminant conjunctival swelling, and secondary angle closure. Despite treatment with intravenous antibiotics, the patient's condition did not improve. With further investigations including ultrasound scan and magnetic resonance imaging, a high-density lesion was found within the globe.

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Sinusitis complicated by orbital apex syndrome is rare. The majority of cases are due to mucormycosis in immunocompromised patients. The authors report a case of orbital apex syndrome secondary to Pseudomonas sinusitis.

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