The precorneal tear film in horses: its importance and disorders.

The research paper primarily discusses the significance and disorders of the precorneal tear film (PTF) in horses, hinting at its potential as a cause and sign of corneal diseases. It highlights the need for further research to understand the detailed bio-chemical composition and pH levels of PTF to precisely determine cause-and-effect relationships with various ocular surface diseases.

Understanding Precorneal Tear Film (PTF)

• The precorneal tear film (PTF) is a thin film of tears that continuously bathes, nourishes, and protects the cornea. Its quantitative and qualitative aspects are considered vital for corneal physiology.
• The study suggests that abnormalities in PTF could be both a cause and symptom of various corneal diseases. Understanding these abnormalities can give invaluable insight into diagnosing and treating associated conditions.

Impact of Topical and Systemic Treatments

• The paper also mentions that certain systemic and topical treatments could influence the volume and composition of the PTF, although not all these interactions are fully understood yet.
• This suggests that physicians and veterinarians conducting eye treatments on horses should take into account the potential impact of these treatments on the PTF.

Promoting Further Research

• The authors strongly advocate for further research into both healthy and diseased states of PTF. A complete understanding of PTF, its bio-chemical composition, pH levels, and its interactions with equine corneal pathogens are key pieces of the puzzle.
• Such research could potentially help define precise cause-and-effect relationships between the spectrum of ocular surface diseases and deficiencies, excesses, and imbalances in PTF components.

Potential Implications for Equine Corneal Diseases

• The paper concludes with a hypothesis that several equine corneal diseases might actually be manifestations of PTF disorders.
• If substantiated, this could revolutionize the framework of understanding and addressing corneal diseases in horses, enabling more targeted and effective treatment strategies.