Anatomy Of The Eye Flashcards
Anatomically, how may the eye be divided
Into 3 layers:
- Fibrous
- Vascular
- Inner
What does the fibrous layer of the eye contain
Sclera and cornea
What is the sclera
White structure comprises 85% of fibrous layer, enables attachment of extra-ocular muscles
What is the cornea
Transparent structure at the front of the eye
What are the 3 components of the vascular layer
- Choroid
- Ciliary body
- Iris
What is the choroid
Blood supply to the retina
What is the ciliary body
Comprised of the ciliary muscle and ciliary process it controls the shape of the lens and produces aqueous humour
What Is the ciliary muscle
Smooth muscle fibres that control shape of the lens
What is the ciliary process
Fibres that connect ciliary muscle to lens
What is the iris
Circular structure with aperture in the centre that enables light to enter. Smooth muscle controls diameter of the iris.
What forms the inner layer of the eye
Retina
What is the retina comprised of
Neural Layer
Pigmented Layer
What is the neural layer
Contains photoreceptors
What is the pigmented layer
Attaches to choroid to help support the neural layer
What is the non-visual retina
Where part of the pigmented layer continues anteriorly without neural layer
What is the optic retina
Neural and pigmented layer
What part of the retina is seen in ophthalmoscopy
Optic retina
What is the centre of the retina called
Macula
How does the macular appear on opthalmoscopy
Yellow
What is in the centre of the macula
Fovea
What does the fovea do
High-visual acuity
Where does the optic nerve enter the eye
Optic disc
What is not located at the optic disc
Photoreceptors
What are the two compartments of the eye
anterior and posterior chamber
What is the anterior chamber of the eye
from lens to cornea
where is the posterior chamber of the eye
iris and ciliary process
what are chambers filled with
aqueous humour
what drains aqueous humour
canal of schlemm - located in the trabecular meshwork