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Tribology and the Ocular Surface
Chris W Lievens1,2, Elyse Rayborn1
1Southern College of Optometry, Memphis, TN, USA.
Clinical Ophthalmology (Auckland, N.Z.)
|April 7, 2022
Summary
Tribology, the study of friction and lubrication, offers insights into eye conditions like dry eye and contact lens issues. Understanding ocular tribology may help explain and treat lid wiper epitheliopathy (LWE).
Area of Science:
- Ocular surface science
- Biomechanical interactions
- Tribology
Background:
- Tribology examines friction and lubrication between sliding surfaces.
- Ocular tribology investigates the biomechanics of the eye's surface and eyelid interactions.
- This field may explain issues in dry eye, contact lens discomfort, and lid wiper epitheliopathy (LWE).
Purpose of the Study:
- To review existing literature on ocular tribology and its application to ocular anatomy.
- To explore the role of tribology in understanding conditions like LWE, dry eye, and contact lens intolerance.
Main Methods:
- A PubMed literature review was conducted using keywords: tribology, friction, lid wiper epitheliopathy, contact lens, and dry eye.
- Association for Research in Vision and Ophthalmology (ARVO) abstracts were also reviewed for relevant mentions of tribology and friction.
Main Results:
- Ocular tribology describes the mechanical interactions between eyelids and the globe, influenced by the tear film.
- The Stribeck curve model is applicable, with eye anatomy promoting a hydrodynamic regime for low friction.
- Tear film changes or contact lenses can disrupt this, increasing friction and wear, leading to symptoms.
Conclusions:
- Tribology provides a framework for understanding ocular surface interactions and symptoms.
- Further research is needed, but translating in vitro tribology findings to clinical practice remains a challenge.
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