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Vision

Vision. Slide 1. Segments Chambers Humors. Tunics. Slide 2. 1. Fibrous Tunic Cornea Sclera 2. Vascular Tunic Choroid Ciliary body iris. Slide 3. 3. Sensory Tunic Retina Pigmented layer Nervous layer Rods Cones Bipolar Horizontal Amacrine Ganglion. Light refraction

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Vision

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  1. Vision

  2. Slide 1 Segments Chambers Humors

  3. Tunics Slide 2 1.Fibrous Tunic • Cornea • Sclera 2. Vascular Tunic • Choroid • Ciliary body • iris

  4. Slide 3 3. Sensory Tunic • Retina • Pigmented layer • Nervous layer • Rods • Cones • Bipolar • Horizontal • Amacrine • Ganglion

  5. Light refraction • Lens Accommodation • Disorders: • Myopia • Hyperopia • Presbyopia • Astigmatism Slide 4

  6. Excitation of photoreceptors Slide 5 Photoreception • Photopigments • Opsins and Retinal • Rods • Cones (b,r,g)

  7. Slide 6 How photopigments respond to light.

  8. Slide 7 Release of neurotransmitter by photoreceptors

  9. Pathway to the brain Slide 8 Ganglia Optic Nerve Optic Chiasma Optic Tracts Optic Radiation

  10. 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?

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