Publications by authors named "Poemen P M Chan"

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 apply retinal nerve fiber layer (RNFL) optical texture analysis (ROTA) to investigate the prevalence, patterns, and risk factors of RNFL defects in patients with ocular hypertension (OHT) who showed normal optic disc and RNFL configuration in clinical examination, normal RNFL thickness on OCT analysis, and normal visual field (VF) results.

Design: Cross-sectional study.

Participants: Six hundred eyes of 306 patients with OHT.

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Pediatric glaucoma (PG) covers a rare and heterogeneous group of diseases with variable causes and presentations. Delayed diagnosis of PG could lead to blindness, bringing emotional and psychological burdens to patients' caregivers. Recent genetic studies identified novel causative genes, which may provide new insight into the etiology of PG.

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Background: Whereas lowering the intraocular pressure (IOP) can slow optic nerve degeneration in glaucoma, many patients with glaucoma continue to develop progressive loss in vision despite a significant reduction in IOP. No treatment has been shown to be effective for neuroprotection in glaucoma. We set out to conduct a randomized controlled trial to investigate whether nicotinamide riboside (NR), a nicotinamide adenine dinucleotide precursor, is effective to slow optic nerve degeneration in patients with primary open-angle glaucoma (POAG).

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To evaluate the repeatability and agreement of corneal and biometry measurements obtained with two swept-source optical coherence tomography (SSOCT) and a partial coherence interferometry-based device. This is a cross-sectional study. Forty-eight eyes of 48 patients had three consecutive measurements for ANTERION (Heidelberg Engineering, Germany), CASIAII (Tomey, Japan) and IOLMaster500 (Carl Zeiss Meditec, USA) on the same visit.

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Aim: To investigate the safety and potential savings of decreasing medication use in low-risk patients with ocular hypertension (OH).

Methods: Patients with OH receiving pressure-lowering medication identified by medical record review at a university hospital underwent examination by a glaucoma specialist with assessment of visual field (VF), vertical cup-to-disc ratio (vCDR), central corneal thickness and intraocular pressure (IOP). Subjects with estimated 5-year risk of glaucoma conversion <15% were asked to discontinue ≥1 medication, IOP was remeasured 1 month later and risk was re-evaluated at 1 year.

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Background: To evaluate risk factors for the recurrence of serous macular detachment in untreated patients with central serous chorioretinopathy (CSC).

Methods: Retrospective review of untreated CSC patients with a follow-up of ≥3 years. Patient demographics, visual outcome and risk factors for the recurrence of CSC were analyzed.

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