11

VisionVision

22

Segments

Chambers

Humors

Slide 1

33

TunicsTunics

1.1. Fibrous TunicFibrous Tunic CorneaCornea ScleraSclera

2. Vascular Tunic2. Vascular Tunic ChoroidChoroid Ciliary bodyCiliary body irisiris

Slide 2

44

3. Sensory Tunic3. Sensory Tunic RetinaRetina

Pigmented layerPigmented layer

Nervous layerNervous layer RodsRods ConesCones BipolarBipolar Horizontal Horizontal AmacrineAmacrine GanglionGanglion

Slide 3

55

• Light refraction

• Lens Accommodation

Disorders:

Myopia

Hyperopia

Presbyopia

Astigmatism

Slide 4

66

Excitation of photoreceptorsExcitation of photoreceptors

PhotoreceptionPhotoreception

PhotopigmentsPhotopigments Opsins and RetinalOpsins and Retinal

RodsRods

Cones (b,r,g)Cones (b,r,g)

Slide 5

77

How photopigments respond to light.

Slide 6

88

Release of neurotransmitter by photoreceptors

Slide 7

99

Pathway to the brainPathway to the brain

GangliaGanglia

Optic Nerve Optic Nerve

Optic ChiasmaOptic Chiasma

Optic TractsOptic Tracts

Optic RadiationOptic Radiation

Slide 8

16.14 What is lacrimal fluid and what are its functions?16.14 What is lacrimal fluid and what are its functions?

16.15 Why does your nose run when you cry?16.15 Why does your nose run when you cry?

16.16 What are the components of the fibrous tunic and vascular tunic?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 16.19 Which part of the retina produces the sharpest vision when light falls on it?it?

16.20 What is the function of the aqueous humor? The vitreous body/humor?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 16.22 What is refraction? Which components of the eye are primarily responsible for refracting light?responsible for refracting light?

16.23 If you look at the horizon to determine where you are, then look down to 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 read a map, what process must your eyes accomplish to keep your vision focused?focused?

16.29 How do photopigments respond to light and recover in the dark?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 16.30 Why does a decreased release of glutamate by photoreceptors generate a receptor potential in bipolar cells?a receptor potential in bipolar cells?

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