Visual Tracts Flashcards
What is the function of the eyelid?
Protects the eye lmao
What are the tarsal glands?
Special sebaceous glands whose secretion stops evaporation of tears
What can happen is the tarsal glands are blocked?
Can lead to Chalazion
What results from an infection of the sebaceous gland of eyelashes?
A stye
Function of lacrimal gland?
Location?
Produces tears
Located beneath conjunctiva
What is the lacrimal glands made up of?
Tuboloacinar serous glands
Where does the lacrimal gland drain to?
Nasolacrimal duct
What are the palpebrae and bulbar conjunctiva?
Thin mucous membrane
What is the histology of the palpebrae and bulbar conjunctive?
Stratified columnar epithelium w/ globet cells
What is the anterior chamber of the eye?
Space b/w cornea and iri
What is the posterior chamber of the eye?
Space b/w posterior surface of iris and anterior surface of lens
What is the vitreous chamber?
Space b/w posterior surface of lens and the neural retina
What does the vitreous chamber contain? For what purpose?
Vitreous humor to help maintain shape
What are the three tunics of the eye?
Fibrous
Vascular
Retina
What does the fibrous tunic consist of?
Cornea and sclera
Corneoscleral coat
Histologically, what is the sclera?
Dense irregular connective tissue
What is the funciton of the sclera?
◦ Support eye shape
◦ Protects delicate internal structures
◦ Extrinsic eye muscle attachment site
What is the cornea comprised of?
Two layers of epithelium w/ organized connective tissue
What is the funciton of the cornea?
Protect anterior surface of eye
Refract incoming light
What pierces the sclera?
Blood vessels, nerves and optic nerve
What are the 5 layers of the cornea?
- Corneal epithelium
- Bowman’s membrane
- Corneal stroma
- Descemet’s membrane
- Corneal endothelium
What is the chief refractive element of the eye?
Cornea
Histologically, the corneal epithelium?
Non-keratinized stratified squamous
What does the corneal epithelium contain?
Stem cells for cornea in limbus region