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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 eye1

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 eye2
External structures of the EYE
  • Tear gland: produces tears
slide8

Anterior structures of the EYE

  • Sclera: white area
  • Iris:
slide9

Anterior structures of the EYE

  • Sclera: white area
  • Iris: colored area that constricts and dilates
  • Pupil:
slide10

Anterior structures of the EYE

  • Sclera: white area
  • Iris: colored area that constricts and dilates
  • Pupil: hole in the iris
  • Time of death
slide13

Anterior structures of the EYE

  • Sclera: white area
  • Iris: colored area that constricts and dilates
  • Pupil: opening in the iris
  • Cornea:
slide14

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
slide16

Anterior structures of the EYE

  • Aqueous humor: fluid between the cornea and lens

?

slide19

Anterior structures of the EYE

  • Lens: focuses the image
slide20

?

?

slide21

Anterior structures of the EYE

  • Muscles and ligaments:
slide22

Anterior structures of the EYE

  • Muscles and ligaments: pull on lens to focus image
slide25

Internal structures of the EYE

  • Vitreous humor: thick gel that fills the back of the eye
slide26

Internal structures of the EYE

  • Vitreous humor: thick gel that fills the back of the eye
slide27

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
slide28

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

Macula

slide29

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

slide31

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

slide32

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.
slide48
Lenses
  • Lens of the eye
  • Inverted image
  • 20/20