Ocular Surface Homeostasis
Ocular Surface Homeostasis - Related Videos
03:06
A Method to Induce Ocular Surface Inflammation in a Murine Model
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2025
This video demonstrates a method to induce ocular surface inflammation and meibomian gland dysfunction in a murine model. Stimulation of the mouse's immune system using an immunogen and later restimulation with the same immunogen promotes ocular surface inflammation, which causes plugging of meibomian gland secretion through neutrophil-produced aggNETs and leads to dry eye disease.
01:16
What is Homeostasis?
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2023
Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
01:31
pH Homeostasis
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2023
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation. Respiratory Regulation of...
06:38
Induction of Ocular Surface Inflammation and Collection of Involved Tissues
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Cited by 2 •
2022
Ocular surface inflammation harms the ocular surface tissues and compromises vital functions of the eye. The present protocol describes a method to induce ocular inflammation and collect compromised tissues in a mouse model of Meibomian gland dysfunction (MGD).
03:40
Nasolacrimal Lavage as a Treatment for Ocular Surface Toxic Soup Syndrome
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Cited by 1 •
2025
OSTSS leads to pooled inflammatory mediators in the tear film, causing symptoms like epiphora and discomfort. Here, we present a case where therapeutic nasolacrimal lavage every 2 months resolved epiphora and itchiness, suggesting its efficacy as a therapeutic intervention for OSTSS. Additionally, we report subjective improvements in symptoms in 3 additional patients.
FAQs
Blinking and tear secretion operate as a coordinated protective cycle. Each blink spreads the tear film across epithelial surfaces, while secretion replenishes the lubricating layer and supplies antimicrobial and growth-supporting components. This cooperation helps clear debris, maintain surface comfort, and preserve conditions in which the cornea and conjunctiva can function without persistent irritation.
The tear film provides several forms of support at once. It reduces friction across the ocular surface, helps remove debris, and carries antimicrobial and growth-supporting components. Its protective role therefore connects mechanical cleansing with biological defense and epithelial support. Disturbance of the film can consequently affect both comfort and the stability of surface tissues.
These systems stabilize the ocular surface through complementary roles. Epithelial barriers help protect underlying tissue, innervation contributes to coordinated surface function, and immune regulation limits damaging disruption while supporting protection. Their interaction means that surface health depends on more than tear volume alone, since barrier integrity, neural control, and inflammatory balance also influence the final condition of the eye.
Inflammation, reduced tear production, excessive evaporation, and eyelid dysfunction can each disturb the normal balance of the ocular surface. Although their initiating problems differ, they may impair tear-film protection, epithelial stability, or debris clearance. The resulting irritation and visual disturbance can therefore reflect several distinct biological failures, making the underlying cause important for diagnosis and treatment design.
The homeostatic framework helps connect symptoms with possible sources of disruption. Irritation or visual disturbance may arise from inflammation, insufficient tear production, abnormal evaporation, or eyelid dysfunction. Considering these mechanisms supports more informed diagnosis by relating the observed problem to tear-film protection, epithelial barriers, and the coordinated functions that normally maintain a healthy ocular surface.
Research can use ocular surface homeostasis as a framework for designing therapies that address more than short-term discomfort. Potential treatment goals include restoring tear-film support, improving epithelial barrier function, and correcting disturbances associated with inflammation or eyelid dysfunction. Outcomes of interest include greater comfort and more stable vision, alongside recovery of the surface environment.