Summary Topic 8 Eye and eye development

The Eye
The Eye converts light energy into electrical energy
.
-




S.I units
conjuctive
&

(
-macula
S
pupil - Blind spot




I liary musche


Correa + Lens =
focus light onto the retina
Vitreous humour :
transparentjelly

Pupil + Iris Antagmistic

2
Radial


&
muscles -



Circular muscles
-
~ CM contract = constriction
-
RM contract = dilate



sm
highlight intensity
- photoreceptors > optic e
nerve
synapse

Sympatetic e
inhibitory synapse (no action potentials)
motor neurones radial muscles relax
=




Parasympathetic +
Stimulatory synapse (action potentials)
motor neurones > circular muscle contracts
-

, Sclera white hard ,
gives eye shape
= ,




Choroid layer blood vessels to
transport oxygen and
+
glucose for aerobic respiration production of ATP
,




S.I units Retinu =
~
Rods and Cones
-
&
'Forea
peripheral

Rods :
* > Furthest point
from light
-




Jotement
() /innement
I1] synaptic region
Bipolar neurone -
ganglion neurones
a optic leave


Outer
retinal
Segment pig
ment rhodopsin formed
-
of
and opsin joined by bond a



Retinal = refina from vitamin A

Inner - lots mitochondria ,
segment of generates ATP
Synaptic a
region
connected to a
bipolar nerve -
generator
potentials
Dark Conditions :



Nutispumped outof theinnerseymenevels facilitated
and via

in he outer

segment
-
> Results Neurotransmitter secreted via exocytosis
in

called glutamate which is an
inhibitory
neurotransmitter