Final Flashcards
The eye measures about
2.5cm in diameter
How much of the eye’s anterior surface is visible?
1/ 6
The eye is enclosed by
Fat and bony orbit
Photo receptors
Cells that helpus see color and allow us to see at night
Photoreceptors are distributed over most of the
Retina
- except where your optic nerve leaves your eye
The optic disk (blind spot) is located in the
Posterior wall of your eye called the: fundus
Macula
Yellow spot
Fovea centralis
Focuses on color
Rods
Specialized photoreceptors for dim light
Cones
Color photoreceptors for high light intensity
To excite rods and cones what must happen?
Light must pass through your ganglion cells layer and your bipolar cell layers
Optic nerves
Are bundles of fibers
Lens contain
Anterior segment & posterior segment
Posterior segments
Contain vitreous humor (gel like substance)
Anterior segment
Contums aqueous humor (water fluid )
Ciliary process
Forms capillaries to maintain pressure in the eye and provide nutrients to Lense and cornea
Scleral Venus sinus
Posterior to Iris, helps keep retina pressed firmly against wall of the eyeball
1 ciliary muscle
- Ciliary process
3 ciliary zonule
4 cornea
5 Iris
6 pupil
7 anterior pole
8 anterior segment (contains aqueous humor)
9 lens
10 scleral venous sinus
11 posterior segment (contains virteous humor)
12 Ora serrata
13 sclera
14 choroid
15 Retina
16 macula lutea
- Fovea centralis
18 posterior pole
19 optic nerve
20 central artery and vein of retina
21 optic disc (blind spot)
What is the ear?
Ear is important for hearing and equilibrium
Ear is divided into how many parts?
External ear
Middle ear
Internal ear
External ear
Vital to hearing
Middle ear
Vital to hearing
Internal ear
Vital to hearing and equilibrium
