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Cynthia Yu-Wai-Man

Publications and source records attributed to Cynthia Yu-Wai-Man.

2 recordsLinked to original sources

Advancing glaucoma research with multiphysics continuum mechanics modelling: Opportunities and open challenges

This review examines the emerging role of mechanistic mathematical models based on continuum mechanics to address current challenges in glaucoma research. At present, the advent of Artificial Intelligence and data-based models have resulted in significant progress in drug candidate screening, target identification and delivery optimization for glaucoma treatment. Physics-based models on the other hand offer mechanistic insight by modelling fundamental physical knowledge. Mechanistic models, and specifically those based on continuum mechanics, have the potential to contribute to a better understanding of glaucoma through the description of intraocular fluid dynamics, mass and heat transfer and other basic physical phenomena. So far, these models have expanded our understanding of ocular fluid dynamics, including descriptions of fluid flow profiles within the anterior chamber of the eye under glaucomatous conditions. With the ongoing development of multiphysics modelling frameworks, there is increasing potential to apply these tools to a wide range of current challenges within the field of glaucoma research. These challenges include glaucoma drainage devices, minimally invasive surgical procedures, therapeutic contact lenses, laser-based interventions like peripheral iridotomy, and the design and optimization of biodegradable drug-releasing intracameral implants, which support patient-specific strategies for glaucoma diagnosis and treatment

q-bio.TO

Comparative CFD modelling of the interplay between aqueous humour hydrodynamics and drug and nanocarrier transport for glaucoma drug delivery via intracameral injection, drug-eluting implants and contact lenses

Glaucoma is the leading cause of irreversible blindness worldwide and often requires long-term administration of intraocular pressure-lowering agents. The effectiveness of ocular drug delivery depends not only on the delivery route but also on the transport mechanisms governing drug distribution within the eye. In this study, a computational fluid dynamics (CFD) framework was developed to investigate the influence of aqueous humour hydrodynamics on the transport of dissolved drugs and nanocarriers delivered by three clinically relevant strategies: intracameral injection, drug-eluting implants and contact lenses. An idealised three-dimensional model of the anterior segment was implemented in COMSOL Multiphysics v6.4, incorporating aqueous humour flow, thermal convection, drug transport, saccadic eye movements and particle tracing. This framework enabled direct comparison of molecular diffusion- and particle-mediated delivery. Simulations revealed substantial differences in intraocular transport among the delivery strategies. Contact-lens delivery produced the most homogeneous drug distributions, whereas implant-based delivery generated persistent concentration gradients associated with localised release. Intracameral injection exhibited intermediate behaviour, with rapid redistribution by aqueous humour circulation. Nanocarrier transport showed greater spatial heterogeneity than dissolved-drug transport owing to reduced diffusivity and consequently stronger advection-dominated transport. These findings demonstrate that aqueous humour hydrodynamics are an independent determinant of ocular drug transport and should be considered in the design of sustained ophthalmic drug delivery systems. The proposed framework provides a versatile computational tool for the optimisation of both dissolved-drug and nanocarrier-based glaucoma therapies.

q-bio.TO