The Eye
description
Transcript of The Eye
The Eye
The EyeThe 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
Caruncle
Tear gland
External structures of the EYE
• Tear gland:
External structures of the EYE
• Tear gland: produces tears
Anterior structures of the EYE
Anterior structures of the EYE
• Sclera:
• Sclera: white area
• Iris:
Anterior structures of the EYE
• Sclera: white area
• Iris: colored area that constricts and dilates
• Pupil:
Anterior structures of the EYE
• Sclera: white area
• Iris: colored area that constricts and dilates
• Pupil: hole in the iris
• Time of death
Anterior structures of the EYE
Can you TOUCH your iris?
?
• Sclera: white area
• Iris: colored area that constricts and dilates
• Pupil: opening in the iris
• Cornea:
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
Anterior structures of the EYE
Anterior structures of the EYE
?
• Aqueous humor: fluid between the cornea and lens
Anterior structures of the EYE
?
?
• Lens:
Anterior structures of the EYE
• Lens: focuses the image
Anterior structures of the EYE
?
?
• Muscles and ligaments:
Anterior structures of the EYE
• Muscles and ligaments: pull on lens to focus image
Anterior structures of the EYE
Internal structures of the EYE
?
• Vitreous humor:
Internal structures of the EYE
• Vitreous humor: thick gel that fills the back of the eye
Internal structures of the EYE
• Vitreous humor: thick gel that fills the back of the eye
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
Internal structures of the EYE
• Macula: “ the yellow spot’ , portion of the retina that contains highest concentration of cones, no rods
Macula
• 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
?
• Optic Nerve: Group of nerve cells that transfer visual information from the retina to the vision centers of the brain via electrical impulses.
• 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.
The next few slides are just some optical illusions
• Lenses
• Lens of the eye
• Inverted image
• 20/20