Ch 15: Continued Flashcards
Emmetropia
Ciliary muscles are relaxed and lens is flat
Distant vision
Ciliary muscles in the ciliary body are relaxed
- lens is flat
Near vision
Ciliary muscles in the ciliary body contract
- lens is oval shaped
Path of light entering the eye
- Lights strikes cornea, then anterior chamber, then pupil, then lens.
- Like goes to the ventrious chamber, then light moves back to Fovia ventralious on retina.
What is the first layer for the path of light layer?
Ganglionic layer
What is the last layer of path of light?
Photo receptor layer
What is the first layer to receive action potential?
Ganglionic layer
What is the last layer to receive action potential?
Photo receptor layer
Definition of focal point
Like crosses together when entering in the retina
The nasal part of the left visual field is also called
Ipsilateral
The temporal part of left visual field is
Is contralateral when it hits optic chiasm
What is the visual pathway using left visual field?
- Light passes through optic nerve.
- Optic chiasm.
- Optic tracks.
- Superior colliculi.
- Lateral geniculate nuclei.
- Optic radiation
- Visual cortex in occipital lobe
Definition of astigmatism
Cornea Orleans, not uniformly curved
Cataract
Clouding of the lens
Diabetic retinopathy
Dysfunction of peripheral circulation
Glaucoma
Increased intraocular pressure by aqueous humor build up
Hyperopia
Farsightedness
Macular degeneration
Common in older people, loss in acute vision
Myopia
Nearsightedness
Presbyopia
Old peoples eyes degeneration of accommodation
-Can be corrected by glasses
Retinal detachment
Results in complete blindness
Auracle or pinna
Elastic cartilage covered with skin
External auditory canal
Lined with hairs in ceruminous glands
Middle ear infection is caused by
Otitis media
What allows the ear infection to occur/drain?
Auditory tube
What are three (ossicles) inner part of the ear?
- Malleus.
- Incus.
- Stapes
Function of cochlea
Hearing
Function of vestibule
Static balance
Vestibulocochlear nerve
Hearing and balance
Function of semi circular canals
Dynamic balance
What membrane separates the external ear from the inner and middle ear?
Tim panic membrane
What muscle is associated with head of malleus
Tensor, tympani muscle
What muscle is associated with stapes
Stapedius muscle
Is incus have a muscle to associate with
No
How many chambers is there in the inner ear?
Three Chambers
What are the three Chambers in the inner ear?
Scala vestibuli
Scala media
Scala tympani
What are the two membranes in the inner ear?
Vestibular membrane, and basilar membrane
What are both membranes filled with?
Perilymph
What does round window do
Dampens the sound wave
Function of otolithic membrane
Hair, rubbing up to perceive static balance
