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Flow dynamics of vitreous humour during saccadic eye movements

Title
Flow dynamics of vitreous humour during saccadic eye movements
Type
Article in International Scientific Journal
Year
2020
Authors
Silva, AF
(Author)
Other
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Pimenta, F
(Author)
Other
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Alves, MA
(Author)
FEUP
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Oliveira, MSN
(Author)
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Journal
Vol. 110
ISSN: 1751-6161
Publisher: Elsevier
Indexing
Other information
Authenticus ID: P-00S-J1Q
Abstract (EN): In this work, we reveal the flow dynamics of Vitreous Humour (VH) gel and liquid phases during saccadic movements of the eye, considering the biofluids viscoelastic character as well as realistic eye chamber geometry and taking into account the saccade profile. We quantify the differences in the flow dynamics of VH gel and liquid phases using viscoelastic rheological models that are able to model the VH shear rheology, considering different amplitudes of saccadic movements (10 degrees, 20 degrees, 30 degrees and 40 degrees). For this purpose, the computational fluid dynamics (CFD) open source software OpenFOAM (R) was used. The results portray a distinct flow behaviour for the VH gel and liquid phases, with inertial effects being more significant for the VH liquid phase. Moreover, the Wall Shear Stress (WSS) values produced by the VH gel phase are more than twice of those generated by the VH liquid phase. Results also show that for different amplitudes of eye movement both the velocity magnitude in the vitreous cavity and the shear stresses on the cavity walls rise with increasing saccadic movement displacement.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 11
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