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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...
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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: Jun 4, 2026

Manipulating the Murine Lacrimal Gland
05:56

Manipulating the Murine Lacrimal Gland

Published on: November 18, 2014

The Lacrimal System.

Shweta Kumar1, Benyam Kinde2, Nancy Pham1

  • 1Department of Radiology, Stanford University, CA, USA.

Radiologic Clinics of North America
|June 2, 2026
PubMed
Summary
This summary is machine-generated.

Diseases of the lacrimal gland can cause various symptoms. Accurate diagnosis of lacrimal gland lesions, often requiring tissue sampling, is crucial for effective management.

Keywords:
Lacrimal glandLacrimal sacLacrimal system

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Area of Science:

  • Ophthalmology
  • Radiology
  • Pathology

Background:

  • The lacrimal gland is vital for tear film production.
  • Lacrimal gland diseases manifest with symptoms like dry eye, pain, proptosis, and diplopia.
  • Lesions of the lacrimal gland are diverse, including inflammatory, lymphoproliferative, and epithelial tumors.

Purpose of the Study:

  • To highlight the diagnostic challenges in lacrimal gland lesions.
  • To emphasize the importance of tissue sampling for accurate diagnosis.
  • To discuss the role of imaging in evaluating lacrimal gland pathology.

Main Methods:

  • Review of conventional CT and MR imaging features of lacrimal gland lesions.
  • Consideration of advanced MR techniques for tissue-specific information.
  • Integration of clinical history and examination findings with imaging results.

Main Results:

  • Lacrimal gland lesions exhibit diverse pathologies with overlapping imaging features.
  • Conventional imaging (CT/MR) assists in diagnosis and defining lesion extent.
  • Tissue sampling remains essential for definitive diagnosis and guiding treatment.

Conclusions:

  • Accurate diagnosis of lacrimal gland lesions necessitates a multidisciplinary approach.
  • Imaging plays a key role, but histopathology is often required.
  • Differential diagnoses should include lacrimal sac and extra-orbital pathologies.