1. The Eye

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

3. The Eye Attached to …. Which is attached directly to…. WOW! You have BEAUTIFUL…. EYES! Brains???

4. The Eye The number of eye blinks varies ~29 blinks/minute while talking ~4 blinks/minute while reading In one lifetime, you will spend 5 years of your life blinking

5. External structures of the EYE

6. Caruncle Tear gland

7. External structures of the EYE Tear gland:

8. External structures of the EYE Tear gland: produces tears

9. External structures of the EYE Caruncle Tear gland

10. External structures of the EYE Tear gland: produces tears Tear ducts:

11. External structures of the EYE Tear gland: produces tears Tear ducts: drain the tears

12. External structures of the EYE Caruncle Tear gland

13. External structures of the EYE Tear gland: produces tears Tear ducts: drain the tears Caruncle:

14. External structures of the EYE Tear gland: produces tears Tear ducts: drain the tears Caruncle: pink fleshy bump

16. Anterior structures of the EYE

17. Sclera:

18. Sclera: white area Iris: Anterior structures of the EYE

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

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

21. Can you TOUCH your iris?

22. ?

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

24. 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 Anterior structures of the EYE

25. ?

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

27. ?

28. Lens: Anterior structures of the EYE

29. Lens: focuses the image Anterior structures of the EYE

30. ? ?

31. Muscles and ligaments: Anterior structures of the EYE

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

33. Internal structures of the EYE ?

34. Vitreous humor: Internal structures of the EYE

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

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

37. 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 Internal structures of the EYE

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

39. 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

40. ?

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

42. 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.

45. Eye Disorders and Traits Near sightedness Far sightedness Color blindness Depth perception Optical illusions Blind spot Peripheral vision Astigmatism

46. The next few slides are just some optical illusions

61. Lenses Lens of the eye Inverted image 20/20