Clinical and biochemical analysis of the ageing tear film

Mann, Aisling, Campbell, Darren, Mirza, Zeba, Hunt, Olivia, Wolffsohn, James Stuart and Tighe, Brian J (2019). Clinical and biochemical analysis of the ageing tear film. British Journal of Ophthalmology ,

Abstract

Background Tear film stability is important for healthy visual function, and yet little is known of the ageing mechanisms. The aim of this study was to investigate parallels between biochemical changes and clinical physical parameters, which occur in the tear film of two subject populations differing in age by over 30 years. Methods Two distinct age groups were chosen: 11 ‘younger’ (23.7±2.1 years) and 19 ‘older’ (63.0±4.0 years) subjects. A series of clinical tests were performed to access tear volume, tear film stability and general ocular health. Tear protein analyses from extracted Schirmer strips were conducted with the Agilent 2100 Bioanalyzer. Results Clinical investigations highlighted significant differences between the age groups. For example: McMonnies scores (p=0.009) and bulbar redness (p=0.038) were higher for the older group, whereas tear meniscus height was larger (p=0.018) in the younger group. Similarly, relative plasma-derived albumin levels were higher (17.1%±12.4%) in the tears of the older, compared with the younger (5.0%±9.6%) group. A protein peak at ∼23 kDa was observed in 53% of the older group samples but in only 36% of the samples of the younger subjects (p=0.122). Conclusions Distinct differences in tear film composition between the two age groups were observed. Parallels in terms of clinical symptoms which reflected a biochemical response (and vice versa) were found, but specific correlations between clinical measurements and biomarkers for individual subjects were not observed.

Publication DOI: https://doi.org/10.1136/bjophthalmol-2018-313760
Divisions: Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences
Life & Health Sciences > Optometry
Life & Health Sciences
Life & Health Sciences > Ophthalmic Research Group
Engineering & Applied Sciences > Polymer and advanced materials research group
Additional Information: © Author(s) (or their employer(s)) 2019. No commercial re-use. See rights and permissions. Published by BMJ. Creative Commons Attribution Non-Commercial License Funding: British Contact Lens Association Summer Research Scholarship.
Uncontrolled Keywords: ageing biomarkers,corneal haemostasis,tear film stability,tear protein,Ophthalmology,Sensory Systems,Cellular and Molecular Neuroscience
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://bjo.bmj. ... mol-2018-313760 (Publisher URL)
Published Online Date: 2019-05-11
Authors: Mann, Aisling ( 0000-0002-4075-8831)
Campbell, Darren
Mirza, Zeba
Hunt, Olivia
Wolffsohn, James Stuart ( 0000-0003-4673-8927)
Tighe, Brian J

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