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34 Cards in this Set
- Front
- Back
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Resolution depends on ______.
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brightness
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If you hold the 20D lens closer than you are supposed to, the image will get ______.
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smaller
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If you use a 28D lens instead of a 20D lens-- where will you have to hold the lens?
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Closer than with the 20 (thus a higher plus lens = closer)
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What is an advantage to using a 28D lens vs. a 20D lens?
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you get a bigger field of view
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The fundus is the ____ of which the condensing lens forms the image.
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object
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The image, viewed by the examiner is ___ and _____.
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real and aerial
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If the image is perverted, what does this mean?
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real, inverted, and reversed
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Lower power lenses give you ____ magnification and _____ field?
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greater, less
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Lower power lenses _____ the stereo separation.
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enhance
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What are some landmarks in the periphery?
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1- vortex veins
2- long ciliary nerves 3- short ciliary nerves |
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What landmarks are in the post. pole?
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1- ONH
2- macula 3- arcades |
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What does the vortex vein ampulla do?
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it is the drainage of the choroid
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The long ciliary nerves are located at ___ and ___- (clock hours).
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9:00 and 3:00
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The short ciliary nerves are different from the Long ciliary nerves is what way? and-- they are located at ___ and ___. (clock hours)
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the short nerves straddle the vertical bysecting line and are located at 12 and 6.
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What is a quick way to figure out the focal length of a lens in inches?
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40/D (D is the power of the lens in question)
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What does the ciliary body look like? why?
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meat, b/c it is muscle~
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The ___ side of the lens faces the patient.
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flat
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T or F: the prism induced in the 20D lens(or any lens used) is needed to see the periphery.
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true
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Keep the oculars _______ to the eyes as possible.
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as close to
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When doing BIO make sure that both eyes see the _____ thing.
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same
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T or F: where ever the patient is looking--that is where you are examining.
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TRUE
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To start BIO, hold the condensing lens ____ away from the patients eye.
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2 inches
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To view the superior temporal portion of the patients right eye, have them look ______.
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up and left (IS THIS CORRECT--it is from the notes??)
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To view the maximum periphery, the clincian is always positioned _______.
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180 degrees from the direction of gaze.
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THe clincians eye should be about ______ inches from the condensing lens.
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18-20 inches
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_____ retina disorders generally manifest blood/exudate.
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Inner
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____ retina disorders generally appear with pigment.
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Outerq
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How can you decide if the lesion is retina or choroid?
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Retina remains with red-free!!
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Melanin in the RPE will absorb the red-free light, therefore, objects _______ are thus not illuminated.
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Deeper
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Move _____ what you wamt to see.
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toward
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T or F: document your findings in the chart JUST as they are in the eye. (not like you saw them)
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true!
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If you see a blury image, you are too _____ to the patient.
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close
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If you have vertical diplopia, the BIO housing is probably ________.
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tilted
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What are 3 reasons why you may have horizontal diplopia?
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1- you are too close to the patient
2- the IPD of the BIO is not right 3- you have insufficient fusional vergence reserves |
