Vision
1
Slide 1
Segments
Chambers
Humors
2
Tunics
Slide 2
1. Fibrous Tunic


Cornea
Sclera
2. Vascular Tunic

Choroid

Ciliary body

iris
3
3. Sensory Tunic
 Retina
 Pigmented layer
Slide 3
 Nervous layer






Rods
Cones
Bipolar
Horizontal
Amacrine
Ganglion
4
• Light refraction
Slide 4
• Lens Accommodation
Disorders:
Myopia
Hyperopia
Presbyopia
Astigmatism
5
Excitation of photoreceptors
Slide 5
Photoreception
Photopigments

Opsins and Retinal
Rods
Cones (b,r,g)
6
Slide 6
How
photopigments
respond to light.
7
Slide 7
Release of neurotransmitter by photoreceptors
8
Pathway to the brain
Slide 8
Ganglia
Optic Nerve
Optic Chiasma
Optic Tracts
Optic Radiation
9
16.14 What is lacrimal fluid and what are its functions?
16.15 Why does your nose run when you cry?
16.16 What are the components of the fibrous tunic and vascular tunic?
16.19 Which part of the retina produces the sharpest vision when light falls on
it?
16.20 What is the function of the aqueous humor? The vitreous body/humor?
16.22 What is refraction? Which components of the eye are primarily
responsible for refracting light?
16.23 If you look at the horizon to determine where you are, then look down to
read a map, what process must your eyes accomplish to keep your vision
focused?
16.29 How do photopigments respond to light and recover in the dark?
16.30 Why does a decreased release of glutamate by photoreceptors generate
a receptor potential in bipolar cells?
10