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Chapter 2

Chapter 2. The Human Eye. Physics Review. Light: Electromagnetic radiation Wavelength (nm) determines quality Why light? Reliable Prevalent Informative. The Head. Eye placement: Lateral vs. Frontal Skull: Orbit Eye Movement 6 extra-ocular muscles: Conjugate Vergence Eyelids

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Chapter 2

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  1. Chapter 2 The Human Eye

  2. Physics Review • Light: Electromagnetic radiation • Wavelength (nm) determines quality • Why light? • Reliable • Prevalent • Informative

  3. The Head • Eye placement: • Lateral vs. Frontal • Skull: Orbit • Eye Movement • 6 extra-ocular muscles: • Conjugate • Vergence • Eyelids • Tears

  4. Eye Function • What is an image? • Image formation = reversing light divergence • Optical Power of… • 1) cornea: 2/3rds of optical power • 2) lens: accommodation

  5. Eye Structure • Three layers: • Protecting: Fibrous Tunic • Nourishing: Vascular Tunic • Detecting: Retina

  6. Fibrous Tunic • Sclera • Cornea

  7. Out of Focus

  8. Problems with Lens • Presbyopia: • Astigmatism

  9. Vascular Tunic • Choroid • Pigment epithelium • Anterior Chamber • Aqueous humor • Lens and pupil

  10. Glaucoma

  11. Retina • Photoreceptors • Landmarks: • Macula • Optic Disk

  12. Photoreceptors Paul Bunyan Ate His Rice

  13. Opsin Photopigments • Two components • Opsin: large protein, 3 types • Retinal (vitamin A) • Phototransduction Retinal

  14. Wavelength Sensitivities

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