Back to notes
Differentiate between palpebral conjunctiva and bulbar conjunctiva.
Press to flip
Palpebral conjunctiva lines the inner surface of the eyelids, while bulbar conjunctiva covers the anterior part of the eye.
What is the function of the tarsal glands in the eyelids?
Tarsal glands produce oily secretions that prevent eyelids from sticking together and reduce tear evaporation.
What is the lacrimal caruncle and its function?
The lacrimal caruncle produces thick secretions that contribute to the 'sleep' in the eyes.
Describe the function of eyelashes in eye protection.
Eyelashes are thick hairs that catch debris before it can reach the eye, helping to protect it.
What is conjunctivitis and what often causes it?
Conjunctivitis, or pink eye, is the inflammation of the conjunctiva, often caused by infection.
Outline the tear drainage pathway from production to the nasal cavity.
Tears are produced by the lacrimal gland, drained through lacrimal puncta into canaliculi, collected in the lacrimal sac, and finally drained into the nasal cavity via the nasolacrimal duct.
How does crying lead to a runny nose?
Excessive tear production during crying surpasses the drainage capacity, causing tears to overflow into the nasal cavity.
What conditions can result from blockage or infection of eyelid glands?
A blockage can lead to a chalazion, while infection can cause a stye.
What are the primary functions of the accessory structures of the eye?
The accessory structures protect, lubricate, and support the eye.
Explain the process and purpose of tear production by the lacrimal apparatus.
The lacrimal apparatus produces tears to lubricate the eye, wash away debris and pathogens, and supply nutrients to the cornea and conjunctiva.
Why is vision considered the most important special sense for humans?
Humans rely heavily on vision compared to other senses for interpreting their environment.
What anatomical features define the medial and lateral angles of the eye?
The medial angle is where the eyelids meet near the nose, and the lateral angle is where they meet near the ear.
Why is the prevention of tear evaporation important for eye health?
Preventing tear evaporation ensures the eye remains well-lubricated and protected from irritants and infections.
Describe the role of the eyelids in maintaining eye health.
Eyelids protect the eye by covering it when closed and distribute tears across the eye’s surface to remove debris and keep it lubricated.
What are the main components of tears and their purpose?
Tears contain water, salts, antibodies, and lysozyme, which act as a lubricant, cleaner, and antimicrobial agent.
Previous
Next