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The Eye

The Eye. The Eye. The eye is an organ that can detect light and convert sit into a electro-chemical impulse that is transferred to the brain. External structures of the EYE. Tear gland. Caruncle. External structures of the EYE. Tear gland :. External structures of the EYE.

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The Eye

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  1. The Eye

  2. The Eye The eye is an organ that can detect light and convert sit into a electro-chemical impulse that is transferred to the brain.

  3. External structures of the EYE Tear gland Caruncle

  4. External structures of the EYE • Tear gland:

  5. External structures of the EYE • Tear gland: produces tears

  6. Anterior structures of the EYE

  7. Anterior structures of the EYE • Sclera:

  8. Anterior structures of the EYE • Sclera: white area • Iris:

  9. Anterior structures of the EYE • Sclera: white area • Iris: colored area that constricts and dilates • Pupil:

  10. Anterior structures of the EYE • Sclera: white area • Iris: colored area that constricts and dilates • Pupil: hole in the iris • Time of death

  11. Can you TOUCH your iris?

  12. ?

  13. Anterior structures of the EYE • Sclera: white area • Iris: colored area that constricts and dilates • Pupil: opening in the iris • Cornea:

  14. Anterior structures of the EYE • Sclera: white area • Iris: colored area that constricts and dilates • Pupil: opening in the iris • Cornea: tough, clear layer that covers the front of the eye

  15. Anterior structures of the EYE ?

  16. Anterior structures of the EYE • Aqueous humor: fluid between the cornea and lens ?

  17. ?

  18. Anterior structures of the EYE • Lens:

  19. Anterior structures of the EYE • Lens: focuses the image

  20. ? ?

  21. Anterior structures of the EYE • Muscles and ligaments:

  22. Anterior structures of the EYE • Muscles and ligaments: pull on lens to focus image

  23. Internal structures of the EYE ?

  24. Internal structures of the EYE • Vitreous humor:

  25. Internal structures of the EYE • Vitreous humor: thick gel that fills the back of the eye

  26. Internal structures of the EYE • Vitreous humor: thick gel that fills the back of the eye

  27. Internal structures of the EYE • Vitreous humor: thick gel that fills the back of the eye • What causes red eyes in a picture? • Retina: inner-most layer made of nervous tissue

  28. Macula: “ the yellow spot’ , portion of the retina that contains highest concentration of cones, no rods Macula

  29. Macula: “ the yellow spot’ , portion of the retina that contains highest concentration of cones, no rods • Fovea: Dimple in the center of Macula. High Visual acuity here Fovea

  30. ?

  31. Optic Nerve: Group of nerve cells that transfer visual information from the retina to the vision centers of the brain via electrical impulses.

  32. Optic Nerve: Group of nerve cells that transfer visual information from the retina to the vision centers of the brain via electrical impulses. • Blind spot: Our blind spot is caused by the absence of specialized photosensitive cells, or photoreceptors, in the part of the retina where the optic nerve exits the eye.

  33. The next few slides are just some optical illusions

  34. Lenses • Lens of the eye • Inverted image • 20/20

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