The fluid mechanics of the eye and the role of the mucus layer

Douglas Platt, Ashuwin Vaidya

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

We discuss the role of the mucus layer in the eye. The tear film in the eye is composed of a mucus layer, an aqueous layer and a lipid layer. While the aqueous and lipid layers are Newtonian, the mucus layer is non-Newtonian. It is commonly believed that the mucus layer serves as a lubricant for the cornea. However, we hypothesize that it serves a greater purpose as a protective layer from foreign particles; the normal stress effects of a viscoelastic fluid under the blinking motion of the eyelid would act towards pushing out any particle embedded in this layer. To prove this hypothesis, we mathematically study the fluid mechanics of a viscoelastic, shear thinning fluid modeled by a generalized second grade fluid. As a first step, we investigate the flow and stresses induced by a shearing motion (part of a blink cycle) and its effect upon an embedded particle, which is modeled by the Wiberg-Smith equation.

Original languageEnglish
Title of host publicationASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010
Pages2205-2212
Number of pages8
EditionPARTS A, B AND C
DOIs
StatePublished - 1 Dec 2010
EventASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels - Montreal, QC, Canada
Duration: 1 Aug 20105 Aug 2010

Publication series

NameAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
NumberPARTS A, B AND C
Volume1
ISSN (Print)0888-8116

Other

OtherASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels
CountryCanada
CityMontreal, QC
Period1/08/105/08/10

Fingerprint

Fluid mechanics
Lipids
Fluids
Shear thinning
Shearing
Lubricants

Cite this

Platt, D., & Vaidya, A. (2010). The fluid mechanics of the eye and the role of the mucus layer. In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010 (PARTS A, B AND C ed., pp. 2205-2212). (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; Vol. 1, No. PARTS A, B AND C). https://doi.org/10.1115/FEDSM-ICNMM2010-30995
Platt, Douglas ; Vaidya, Ashuwin. / The fluid mechanics of the eye and the role of the mucus layer. ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010. PARTS A, B AND C. ed. 2010. pp. 2205-2212 (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; PARTS A, B AND C).
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Platt, D & Vaidya, A 2010, The fluid mechanics of the eye and the role of the mucus layer. in ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010. PARTS A, B AND C edn, American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM, no. PARTS A, B AND C, vol. 1, pp. 2205-2212, ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting, FEDSM 2010 Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, Montreal, QC, Canada, 1/08/10. https://doi.org/10.1115/FEDSM-ICNMM2010-30995

The fluid mechanics of the eye and the role of the mucus layer. / Platt, Douglas; Vaidya, Ashuwin.

ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010. PARTS A, B AND C. ed. 2010. p. 2205-2212 (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; Vol. 1, No. PARTS A, B AND C).

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

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N2 - We discuss the role of the mucus layer in the eye. The tear film in the eye is composed of a mucus layer, an aqueous layer and a lipid layer. While the aqueous and lipid layers are Newtonian, the mucus layer is non-Newtonian. It is commonly believed that the mucus layer serves as a lubricant for the cornea. However, we hypothesize that it serves a greater purpose as a protective layer from foreign particles; the normal stress effects of a viscoelastic fluid under the blinking motion of the eyelid would act towards pushing out any particle embedded in this layer. To prove this hypothesis, we mathematically study the fluid mechanics of a viscoelastic, shear thinning fluid modeled by a generalized second grade fluid. As a first step, we investigate the flow and stresses induced by a shearing motion (part of a blink cycle) and its effect upon an embedded particle, which is modeled by the Wiberg-Smith equation.

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Platt D, Vaidya A. The fluid mechanics of the eye and the role of the mucus layer. In ASME 2010 3rd Joint US-European Fluids Engineering Summer Meeting Collocated with 8th International Conference on Nanochannels, Microchannels, and Minichannels, FEDSM2010. PARTS A, B AND C ed. 2010. p. 2205-2212. (American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM; PARTS A, B AND C). https://doi.org/10.1115/FEDSM-ICNMM2010-30995