Publications by authors named "Victor T C Koh"

Prcis: In our case series, the 3-year failure for Paul Glaucoma Implant (PGI) implantation was 14.6%. At 3 years postoperatively, there was a significant reduction in mean intraocular pressure (IOP) and the number of glaucoma medications used.

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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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Aims: To determine axial length (AL) elongation profiles in children aged 3-6 years in an Asian population.

Methods: Eligible subjects were recruited from the Growing Up in Singapore Towards Healthy Outcomes birth cohort. AL measurement was performed using IOLMaster (Carl Zeiss Meditec, Jena, Germany) at 3 and 6 years.

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Article Synopsis
  • The study assessed the accuracy of three large language models (LLMs) — ChatGPT-3.5, ChatGPT-4.0, and Google Bard — in addressing common myopia-related questions, with a focus on six key areas, including treatment and prevention.
  • ChatGPT-4.0 outperformed the other models, achieving 80.6% ‘good’ accuracy in responses, while ChatGPT-3.5 and Google Bard scored 61.3% and 54.8%, respectively; all models showed high scores in comprehensiveness.
  • Self-correction capabilities were notable, with improvements seen in a significant portion of responses: 66.7% for ChatGPT-4
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Background: Diabetic retinopathy (DR) screening using colour retinal photographs is cost-effective and time-efficient. In real-world clinical settings, DR severity is frequently graded by individuals of different expertise levels. We aim to determine the agreement in DR severity grading between human graders of varying expertise and an automated deep learning DR screening software (ADLS).

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Background: Virtual reality, augmented reality, and mixed reality make use of a variety of different software and hardware, but they share three main characteristics: immersion, presence, and interaction. The umbrella term for technologies with these characteristics is extended reality. The ability of extended reality to create environments that are otherwise impossible in the real world has practical implications in the medical discipline.

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Precis: Repeat micropulse transscleral cyclophotocoagulation (MPTCP) has some benefit in lowering intraocular pressure (IOP). There was a small risk of loss of vision, prolonged hypotony, and phthisis bulbi.

Aim: This study aimed to determine the efficacy and safety of repeated MPTCP for an Asian population with refractory glaucoma.

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Precis: Micropulse transscleral cyclophotocoagulation (MPTCP) is only moderately effective in lowering intraocular pressure (IOP) and is useful as an adjunct procedure to other glaucoma surgeries. There was a small risk of loss of vision, prolonged hypotony, and phthisis bulbi.

Aim: The aim of this study was to determine the efficacy and safety of a single MPTCP treatment for an Asian population with advanced glaucoma.

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Unlabelled: PRéCIS:: In advanced refractory glaucoma which has failed prior MP3 laser, MP3 Plus is effective in reducing intraocular pressure (IOP) without significant complications. It is also useful as a temporizing procedure before incisional surgery.

Purpose: To evaluate the efficacy and safety of MP3 Plus, a novel technique using modified micropulse transscleral cyclophototherapy (MPTCP) in eyes with refractory glaucoma or failed MPTCP treatment.

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Purpose: To determine the demographics, risk factors, clinical and microbiological characteristics, and treatment outcome of post-traumatic infective keratitis.

Methods: Consecutive patients with post-traumatic infective keratitis presenting to the Ophthalmology Department of a tertiary referral hospital in Singapore between March 2012 and March 2016 were prospectively identified. A standardized data collection form was used to document patient demographics, microbiological diagnosis, antibiotic sensitivity, and pretreatment and posttreatment ocular characteristics.

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This study aims to systemically review the effect of laser iridotomy on the corneal endothelium. Searches were performed for studies that either compared corneal endothelial cell density/count, corneal thickness and morphology pre- and postiridotomy, or evaluated the postiridotomy development of corneal decompensation. There were 26 eligible studies.

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Topical Bimatoprost is a common and popular prostaglandin analog used as an ocular hypotensive agent in the treatment of glaucoma. Side effects include ocular hyperaemia, ocular pruritus, and periocular and iris pigmentary changes. Perioribital lipodystrophy is another well-documented outcome associated with chronic use of topical bimatoprost, which results in periorbital hallowing, upper eyelid sulcus deepening, eyelid retraction and enophthalmos.

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A web-based anonymous survey was performed to assess the common practices of oculofacial surgeons in the management of orbital and intraocular tumors in the Asia-Pacific region. The questionnaire comprised a series of questions covering controversial topics sent via email to 131 oculofacial surgeons across 14 countries in the Asia-Pacific region. A total response rate of 61.

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