Questions and Answers
What percentage of the eye is made up of water?
99%
What is the main function of tears?
Lubrication, protection, and clearance of debris
What percentage of aqueous humor is composed of water?
99%
What is the function of the vitreous humor?
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What is the importance of water in ocular health?
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What is the composition of tears?
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Study Notes
Structure of the Eye
- The eye is made up of approximately 99% water
- The remaining 1% consists of proteins, carbohydrates, and other substances
Ocular Fluids
-
Tears:
- Composed of 98% water, 1% mucins, and 1% lipids
- Functions: lubrication, protection, and clearance of debris
- Produced by the lacrimal gland and meibomian glands
-
Aqueous Humor:
- Clear, watery fluid filling the anterior and posterior chambers
- Composed of 99% water, with the remaining 1% consisting of ions, glucose, and ascorbic acid
- Functions: maintaining ocular pressure, supplying nutrients, and removing waste products
-
Vitreous Humor:
- Gel-like fluid filling the vitreous cavity
- Composed of 99% water, with the remaining 1% consisting of collagen, hyaluronic acid, and ions
- Functions: giving the eye its shape, maintaining ocular pressure, and allowing light to pass through
Importance of Water in Ocular Health
- Maintains ocular surface health and function
- Supports the health of the cornea, conjunctiva, and sclera
- Helps to flush out irritants and debris from the eye
- Plays a critical role in the production and maintenance of tears and ocular fluids
Structure of the Eye
- The eye is composed of approximately 99% water
- The remaining 1% consists of proteins, carbohydrates, and other substances
Ocular Fluids
Tears
- Composed of 98% water, 1% mucins, and 1% lipids
- Functions: lubrication, protection, and clearance of debris
- Produced by the lacrimal gland and meibomian glands
Aqueous Humor
- Clear, watery fluid filling the anterior and posterior chambers
- Composed of 99% water, with the remaining 1% consisting of ions, glucose, and ascorbic acid
- Functions: maintaining ocular pressure, supplying nutrients, and removing waste products
Vitreous Humor
- Gel-like fluid filling the vitreous cavity
- Composed of 99% water, with the remaining 1% consisting of collagen, hyaluronic acid, and ions
- Functions: giving the eye its shape, maintaining ocular pressure, and allowing light to pass through
Importance of Water in Ocular Health
- Maintains ocular surface health and function
- Supports the health of the cornea, conjunctiva, and sclera
- Helps to flush out irritants and debris from the eye
- Plays a critical role in the production and maintenance of tears and ocular fluids
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