The Structure of the Eye Flashcards
structure
Sclera
wraps around the eye; protects the eye from injuries and helps to maintain the shape
Cornea
Outer covering of the eye; protects the structures INSIDE the eye.
Retina
Near optic nerve; receives light.
Rods
Can only see grey tones (black and white).
Cones
Can see colors. example: The rainbow
Fovea Centralis
Makes you see best and is located on the center of the Macula Lutea (part of RETINA)
Iris
What makes your eye color
Ciliary Body
Behind the Iris; changes your eye so it can focus.
Optic Nerve
Behind the eye; tells the brain what you are seeing. Basically connects the eye to brain.
Aqueous Humor
Keeps the eye inflated.
Vitreous Humor
The space between the lens and the retina.
Lens
Focus; makes an image
Choroid
Found in the brain ventricles; produces fluid
What are the layers of the eye?
Sclera, Cornea, Choroid, Ciliary Body, Iris, Pupil
Tarsal Gland
Helps to prevent eye tares; produces and oily film on eye
Ciliary Gland
Sweat gland; on base of eyelashes
Conjunctiva
Covers the inside of eyelid and the sclera; if infected PINK EYE
Lacrimal Apparatus
Makes tears
Eye Muscles (6)
- Lateral Rectus
- Medial Rectus
- Inferior Rectus
- Superior Rectus
- Superior Oblique
- Inferior Oblique
Accommodation
The eyes ability to be able to bend and flex.
Emmetropic
The “perfect eye” 20/20 vision
Cataracts
Your lens becomes hard and you can end up BLIND
Nearsighted (MYOPIA)
Needs a negative lens to be corrected. Cannot see FAR AWAY
Farsighted (HYPEROPIA)
Needs a + lens to be corrected. Can’t see CLOSE up.
Glaucoma
Nerve connecting the brain is damaged; causing blindness
How is an image processed?
It is burned into the retina and the optic nerve sends the information up to the brain
Tampetum
Reflective layer of Choroid. Think of a deer’s eyes at night, the glow and reflect light.
