review for final!!!!
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| This type of astigmatism is total astigmatism and is found in spectacle Rx? | Refractive astigmatism
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| this type of astigmatism is the difference between k's found on the cornea? | corneal astigmatism
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| this type of astigmatism is tilting or toric crystalline lens? | lenticular astigmatism
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| this is tilted fovea or irregular shape macula? | internal astigmatism
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| this type of astigmatism is not 90 degrees apart and is corrected with gp or pmma | irregular astigmatism
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| know wra/ara/oblique astigmatism | :)
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| know how to fit/apply/remove GP,soft, and hybrid lenses | notes
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| know how to select the best lenses for a patient!! | ex
the ten point quizzes in lab
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| what are the 2 fitting philosophies | 1.intrapalpebral/apical clearance
2.uppperlid/corneal attatchement
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| when fitting with the intrapalpebral/ apical clearance fit , the lens fits between the ____ & _____ lid and centers well | upper;
lower
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| when fitting with the mean you take corneal cyl and divided by _____ then fit flat k steeper by that amount | 2
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| mean of the mean you take the corneal cyl and divide by ____ then fit flat k by that amount | 4
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| upperlid /corneal attachment has a large dia of ? | 9.5
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| upperlid attachment has a _____ bc? | flatter
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| with upperlid attachment the lens is postitioned under the ___ lid which makes it more comfortable because the blink is more natural. | upper
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| upperlid has reduced flare which makes it easier to adapt and has less ____ & ___ o'clock staining | 3&9
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| what are the 4 steps of lens evaluation? | 1.corneal centration
2.movement
3.fluorescein
4.visual aquity
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| average dia for intrapalpebral /apical fit ? | 8.5
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| know how to deliver a contact lens | :)
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| dk/t or dk/l means what | oxygen transmission of a cl in relation to its thickness
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| describe a hybrid lens? | a gp center surrounded by a soft skirt for comfort
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| can you polish a GP | YES
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| do GPs have better long term comfort when comparing to soft lens? | YES
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| do GPs have better optics? | YES
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| are GPs easier to care for | YES
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| GP lenses correct irregular and regular astigmatism using a ____ lens? | sphere
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| can you polish /modify a GP lens? | yes
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| when you first start wearing a GP lens you wear it _____ hours the first day then add an hour each day? | 3
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| the follow ups for a gp lens is ___ week ___ weeks __month _months __months every 6 months | 1.
2
1
2
3
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| when fitting a soft lens choose a dia ____mm larger than the HVID | 2
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| soft contact lenses should always be in ____ cylinder | minus
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| compensate VD if ____ D or greater | 4.00
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| multifocals will not restore someones vision to their ____ vision | youthful
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| anisometropic lenses are another name for what type of lenses? | monovision
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| are monovision lenses easier to fit than bifocals | YES
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| are there more material choices for monovisions? | YES
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| can you get monovisions in sphere /torics or both? | BOTH
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| which has a wider field of view monovisions or bifocals? | monovisions
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| which is less expensive monovisions or bifocals? | monovisions
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| this type of lens is one single vision lens for dv or near | monovision
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| what are the two basic types of bifocal lens designs? | 1.alternating vision/translating bifocals
2.simultaneous vision
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| segmented lenses are more challenging because they need better ____ height measurements? | seg
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| fitting a GP alteranting lens? (6 steps in order) | 1.examine lid position
2.record K's
3.evaluate fit
4.observe the seg placement
5.over refract
6.record BC,power,dv/nv, dia, sh,prism ballast
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| the lower the evalue the ____ the fit | tighter
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| the higher the evalue the ___ the fit | looser
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| hyperflange is used on a _____ lens? | minus
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| hyperflange provides centration for __ riding lenses? | high
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| hypoxia means ? | lack of oxygen
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| diameter gauge, slot gauge, v-groove,shadowgraph, projection magnifier, hand held magnifier are instruments used to determine what? | diameter
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| measuring magnifier, loupe, and shadow graph is used to determine what? | OZ
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| thickness gauge and dial gauge are used to determine what? | center thickness
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| 5 groups water groups ? | 1.low water nonionic
2.high water nonionic
3.low water ionic
4.high water ionic
5.silicone hydrogel
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| does ionic or nonionic attract more deposites? | ionic
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| follow ups for a soft lens? | 1 week;
1 month;
3 months;
6 months;
12 months
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| aldox kills? | acanthomeba
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| polyquad is found in which manufactures products? | ALCON
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| silicone is added for ____ permeability? | oxygen
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| fluorine is used to increase ____ and deposit resistant. | wetablilty
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| start thinking about fitting a soft toric if the refracted cyl is _____? | -0.75
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| if the refracted cyl is over -1.00 definityly fit a soft _____? | toric
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| lars stands for ? | left add ; right subract
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| dk value of 30 is ____ dk value of 151 is _____? | low/high
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| if a lens is high water it has more oxygen which means it has more _______? | deposits
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| acrylate is usually in context with what type of lens? | GP
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| if the refracted cyl is a -.25 or -.50 ______ is usually used | spherical equivalence
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| if refracted cyl is 0.75 or 1.00 fit ___ or toric | sphereical equivalence
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| compensate for VD if GREATER THAN _____(sphere only) | 4.00
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