Retinal Physiology Flashcards
which three layers make the eye tissue? [3]
- outer layer: [2] (front and back?)
- middle layer: [1]
- inner laye: [1]
which three layers make the eye tissue? [3]
- outer layer: sclera (back); cornea (front)
- middle layer: uvea
- inner laye: retina
which of the following is the iris?
A
B
C
D
E
F
which of the following is the iris?
A
B
C
D
E
F
which of the following is the uvea?
A
B
C
D
E
F
which of the following is the uvea?
A
B
C
D
E
F
which of the following is the choroid?
A
B
C
D
E
F
which of the following is the choroid?
A
B
C
D
E
F
which of the following is the ciliary body?
A
B
C
D
E
F
which of the following is the ciliary body?
A
B
C
D
E
F
which of the following is the retina?
A
B
C
D
E
F
which of the following is the retina?
A
B
C
D
E
F
which of the following is the cornea?
A
B
C
D
E
F
which of the following is the cornea?
A
B
C
D
E
F
which part of the eye is the light sensing organ?
choroid
uvea
retina
sclera
iris
which part of the eye is the light sensing organ?
choroid
uvea
retina
sclera
iris
what is the name for the clear bulging surface in front of the eye? [1]
where does it recieve its nutrition from? [1]
whats the nerve supply like? [1]
what is the name for the clear bulging surface in front of the eye? [1]
cornea
where does it recieve its nutrition from? [1]
aqueous humour diffusion (its avasucular) BUT: richly supplied with nerve fibres
function? [2]
the main focussing surface of the eye: where the refractive index of the medium changes from air to transparent tissue !
what keeps the cornea’s shape? [1]
what keeps the cornea’s shape? [1]
intraocular pressure
what is the name for the white of the eye? [1]
what is the name for the pigmented bit of eye? [1]
what is the name for the white of the eye? [1]
sclera (although interior: brown & grooved)
what is the name for the pigmented bit of eye? [1]
iris
what is the conjunctiva? [1]
what type of cells make up the conjuctiva? [1]
function? [1]
what is the conjunctiva? [1]
layer
what type of cells make up the conjuctiva? [1]
stratified columnar epithelium; goblet cells
function? [2]
mucous secreted: mixes with tears to make more viscous
covers sclera & inside of eyelids
which part of the eye contrains pigment epithelial cells which prevent light scattering and reflection & sits inbetween the sclera and the retina?
iris
choroid
cornea
ciliary body
lens
which part of the eye contrains pigment epithelial cells which prevent light scattering and reflection & sits inbetween the sclera and the retina?
iris
choroid
cornea
ciliary body
lens
which part of the eye contains smooth muscle bundles which shapes the lens?
iris
choroid
cornea
ciliary body
lens
which part of the eye contains smooth muscle bundles which shapes the lens?
iris
choroid
cornea
ciliary body
lens
what is the role of the lens? [1]
how is the shape of the lens changed? [1]
what shape is the lens for:
a) close images?
b) distant images?
what is the role of the lens? [1]
- allows eye to focus on objects at various distances
how is the shape of the lens changed? [1]
- ciliary muscles contract / relax
a) close images: bulges
b) distant images: flat
where are the interneurons and ganglion cells which make up the optic nerve found in the eye? [1]
where are the interneurons and ganglion cells which make up the optic nerve found in the eye? [1]
retina