Anatomical features of eye Flashcards
Tunics of the eye
Outer
Middle
Inner
Parts of the outer tunic
cornea
sclera
Parts of the middle tunic
iris
ciliary body
choroid
Parts of the inner tunic
retina
Function of the outer tunic
protection and shape
Function of the middle tunic
Iris - controls how much light enters
Ciliary body - produces parts of aqueous humor
choroid - dense network of blood vessels
Other names for middle tunic
Vascular tunic or uvea
Function of inner tunic
change light into signal that can be carried to optic nerve
Categorize the three layers of the eye
Outer: fibrous
Uvea: vascular
Retina: neural
Features of the sclera
Provides framework
Impenetrable to light
Features of cornea
Transparent
Why is metabolism important to maintain a healthy cornea?
There are no blood vessels in the cornea to maintain its transparency
Features of the iris
Regulates amount of light that can enter
Autonomic control
Features of the ciliary body
Produces aqueous humor that circulates
Controls shape of crystalline lens
What is accomodation?
Changing the shape of the lens to view objects at different distances
What is the purpose of the optic nerve?
Carry information from retina to brain
What is the purpose of the crystalline lens?
Focus light onto the retina
What is the purpose of the extraocular muscles?
Move the eyes
What is binocular vision?
Two eyes with overlapping fields of view
What are three parts of the ocular adnexa?
Conjunctiva
Eye lids
Tear films
Chambers of the globe
Anterior chamber
Posterior chamber
Vitreous chamber
Where is the anterior chamber?
Between cornea and iris/anterior lens
Where is the posterior chamber?
Posterior iris to equatorial lens
Where is the vitreous chamber?
Lens to retina
