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Questions and Answers
Which part of the conjunctiva is primarily responsible for the distribution of tear fluid?
Which part of the conjunctiva is primarily responsible for the distribution of tear fluid?
How much tear fluid can the conjunctival sac accommodate at maximum?
How much tear fluid can the conjunctival sac accommodate at maximum?
What is the primary function of the accessory lacrimal glands?
What is the primary function of the accessory lacrimal glands?
Which arterial supply is associated with the conjunctiva?
Which arterial supply is associated with the conjunctiva?
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What clinical aspect is represented by Arlt's line?
What clinical aspect is represented by Arlt's line?
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Study Notes
Conjunctiva
- The conjunctiva lines the inner surface of the eyelids and covers the sclera.
- It is a transparent mucous membrane.
- The conjunctiva is critical for maintaining the health of the eye.
Parts of the Conjunctiva
- The conjunctival sac is the space between the eyelids and the eyeball.
- The conjunctiva has three main parts:
- Palpebral conjunctiva: Lines the inner surface of the eyelids.
- Bulbar conjunctiva: Covers the sclera.
- Limbal conjunctiva: The junction between the palpebral and bulbar conjunctiva.
Sulcus Subtarsalis
- The sulcus subtarsalis is a groove between the tarsal conjunctiva and the palpebral conjunctiva.
- It is a deep groove that runs along the upper and lower eyelids.
Conjunctival Sac
- The conjunctival sac holds approximately 7 microliters of tear fluid.
- It can accommodate up to 30 microliters of tear fluid.
- The dimensions of the conjunctival sac vary depending on the location measured.
Histology of the Conjunctiva
- The conjunctiva is composed of stratified squamous epithelium, with a basement membrane, stroma and a superficial layer of goblet cells.
- Goblet cells secrete mucin, essential for maintaining a healthy tear film.
Squamous Metaplasia
- Squamous metaplasia is a change in the conjunctiva, where goblet cells are replaced by squamous cells.
- It can be triggered by chronic inflammation or irritation.
Accessory Lacrimal Glands
- Accessory lacrimal glands help to produce tears contributing to the tear film.
- These glands are located in the conjunctiva, contributing to maintaining eye moisture.
Conjunctival Arteries
- Conjunctival arteries include the anterior ciliary artery and the posterior conjunctival artery.
- These arteries supply blood to the conjunctiva.
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Description
This quiz explores the anatomy of the conjunctiva, including its parts and the conjunctival sac. Understand the significance of the palpebral, bulbar, and limbal conjunctiva, and learn about the sulcus subtarsalis. Test your knowledge on these critical components of ocular health!
