Question 1
What is the effect of a lesion through the optic chiasma?
Answer Choices:
It effects left peripheral vision.
It affects left and right medial vision.
It affects left and right lateral vision.
It affects right lateral and left medial vision.
Question 2
Light has to pass through the [a] before it can be refracted by the [b]. Then it has to reach the [c] of the [d] in order to cause [e] to breakdown. This leads to the [f] of sodium channels and a [g] in neurotransmitter release. This change in activity is relayed to the [h] which pass the information along to the [i] within the [j] so that light information can ultimately be sent back to the brain.
All Answer Choices
outer segment
closing
pupil
ganglion cells
rhodopsin
lens
photoreceptor
decrease
retina
bipolar cells
Question 3
Papellidema is _________________ .
Answer Choices:
not able to be observed by ophthalmoscopic examination
also called diplopia because it oftentimes is the result of a neurological disorder
the main cause of vision loss in those over age 65
caused by conditions that increase intracranial pressure
Question 4
Refractive problems of the eyeball include all of the following except___________________________ .
Answer Choices:
myopia
emmetropia
hyperopia
astigmatism
Question 5
The axons of which of the following form the optic nerve?
Answer Choices:
bipolar cells
ganglion cells
cone cells
vertical cells
Question 6
The correct sequence of phototransduction is:
Answer Choices:
light (first messenger), receptor, second messenger, G protein, enzyme
light (first messenger), G protein, receptor, enzyme, second messenger
light (first messenger), receptor, G protein, enzyme, second messenger
light (first messenger), enzyme, receptor, G protein, second messenger
Question 7
The near point of vision _____________________ .
Answer Choices:
represents the maximum buldge the lens can achieve
represents the minimum buldge the lens can achieve
in young adults with emmetropic vision is 10 meters
stays fine in people over 50 years because the lens becomes more accomodating with age
Question 8
What effect would a lesion have in the right optic nerve?
Answer Choices:
Nothing is seen in the far right visual field otherwise all other vision is fine.
Left peripheral vision is decreased.
The person will be blind in the left eye.
The person will be blind in the right eye.
Question 9
What is the effect of a lesion in the left optic tract?
Answer Choices:
It effects left peripheral vision.
It affects left and right medial vision.
It affects left and right lateral vision.
It affects right lateral and left medial vision.
Question 10
What takes place when an individual looks at a distant object?
Answer Choices:
The pupils dilate and the lens becomes more convex.
The pupils dilate and the lens becomes less convex.
The pupils constrict and the lens becomes more convex.
The pupils constrict and the lens becomes less convex.
