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Related Concept Videos

Accessory Structures of the Eye01:17

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Ophthalmic Drug Delivery Systems01:23

Ophthalmic Drug Delivery Systems

Ophthalmic drug delivery faces major limitations due to poor absorption across the corneal membrane. This process is primarily driven by diffusion and is influenced by two main factors: the physicochemical properties of the drug and tear drainage. Most ophthalmic drugs, such as pilocarpine, epinephrine, atropine, and local anesthetics, are weak bases. They are typically formulated at an acidic pH to enhance chemical stability. However, this leads to high ionization, reducing their ability to...
Microbiome of the Eye01:22

Microbiome of the Eye

The human eye has a specialized microbiota that reflects its unique anatomical and immunological environment. This low-biomass microbial community predominantly colonizes the conjunctiva and eyelid margins, playing a vital role in ocular surface homeostasis and defense. Despite its proximity to the richly colonized facial skin, the ocular surface maintains a distinct microbial profile due to continuous mechanical and biochemical defense mechanisms.The conjunctival surface hosts fewer microbial...

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Related Experiment Video

Updated: May 21, 2026

Comparing Objective Conjunctival Hyperemia Grading and the Ocular Surface Disease Index Score in Dry Eye Syndrome During COVID-19
06:29

Comparing Objective Conjunctival Hyperemia Grading and the Ocular Surface Disease Index Score in Dry Eye Syndrome During COVID-19

Published on: May 25, 2022

Evaluation of dry eye.

Samantha McGinnigle1, Shehzad A Naroo, Frank Eperjesi

  • 1School of Life and Health Sciences, Aston University, Birmingham, United Kingdom.

Survey of Ophthalmology
|June 26, 2012
PubMed
Summary
This summary is machine-generated.

Dry eye disease, a complex condition affecting the ocular surface, requires accurate diagnosis. Tear film osmolarity is highlighted as a key objective biomarker for effective dry eye management.

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In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation
08:13

In Vivo Confocal Microscopy in the Diagnosis and Management of Dry Eye: A Focus on Imaging Protocols and Interpretation

Published on: November 11, 2025

Area of Science:

  • Ophthalmology
  • Ocular Surface Disease

Background:

  • Dry eye is a prevalent and multifaceted condition.
  • Dysfunction in ocular structures (lids, glands, nerves) impacts the tear film-ocular surface interface.
  • Symptoms include grittiness, burning, and discomfort.

Purpose of the Study:

  • To emphasize the importance of accurate dry eye investigation.
  • To review diagnostic techniques for dry eye.
  • To identify the most reliable diagnostic biomarker.

Main Methods:

  • Classification of diagnostic techniques based on tear production, stability, and surface damage.
  • Evaluation of technique applicability, validity, reliability, and protocols.
  • Consideration of diagnostic algorithms.

Main Results:

  • Various factors contribute to dry eye.
  • Diagnostic methods assess different aspects of the tear film and ocular surface.
  • A lack of correlation between clinical signs and patient symptoms is noted.

Conclusions:

  • Accurate investigation is crucial for effective dry eye management.
  • Tear film osmolarity is identified as a valuable objective biomarker.
  • Utilizing diagnostic algorithms and objective biomarkers like osmolarity aids in precise diagnosis.