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Contacts III final
review for final!!!!
| Question | Answer |
|---|---|
| This type of astigmatism is total astigmatism and is found in spectacle Rx? | Refractive astigmatism |
| this type of astigmatism is the difference between k's found on the cornea? | corneal astigmatism |
| this type of astigmatism is tilting or toric crystalline lens? | lenticular astigmatism |
| this is tilted fovea or irregular shape macula? | internal astigmatism |
| this type of astigmatism is not 90 degrees apart and is corrected with gp or pmma | irregular astigmatism |
| know wra/ara/oblique astigmatism | :) |
| know how to fit/apply/remove GP,soft, and hybrid lenses | notes |
| know how to select the best lenses for a patient!! | ex the ten point quizzes in lab |
| what are the 2 fitting philosophies | 1.intrapalpebral/apical clearance 2.uppperlid/corneal attatchement |
| when fitting with the intrapalpebral/ apical clearance fit , the lens fits between the ____ & _____ lid and centers well | upper; lower |
| when fitting with the mean you take corneal cyl and divided by _____ then fit flat k steeper by that amount | 2 |
| mean of the mean you take the corneal cyl and divide by ____ then fit flat k by that amount | 4 |
| upperlid /corneal attachment has a large dia of ? | 9.5 |
| upperlid attachment has a _____ bc? | flatter |
| with upperlid attachment the lens is postitioned under the ___ lid which makes it more comfortable because the blink is more natural. | upper |
| upperlid has reduced flare which makes it easier to adapt and has less ____ & ___ o'clock staining | 3&9 |
| what are the 4 steps of lens evaluation? | 1.corneal centration 2.movement 3.fluorescein 4.visual aquity |
| average dia for intrapalpebral /apical fit ? | 8.5 |
| know how to deliver a contact lens | :) |
| dk/t or dk/l means what | oxygen transmission of a cl in relation to its thickness |
| describe a hybrid lens? | a gp center surrounded by a soft skirt for comfort |
| can you polish a GP | YES |
| do GPs have better long term comfort when comparing to soft lens? | YES |
| do GPs have better optics? | YES |
| are GPs easier to care for | YES |
| GP lenses correct irregular and regular astigmatism using a ____ lens? | sphere |
| can you polish /modify a GP lens? | yes |
| when you first start wearing a GP lens you wear it _____ hours the first day then add an hour each day? | 3 |
| the follow ups for a gp lens is ___ week ___ weeks __month _months __months every 6 months | 1. 2 1 2 3 |
| when fitting a soft lens choose a dia ____mm larger than the HVID | 2 |
| soft contact lenses should always be in ____ cylinder | minus |
| compensate VD if ____ D or greater | 4.00 |
| multifocals will not restore someones vision to their ____ vision | youthful |
| anisometropic lenses are another name for what type of lenses? | monovision |
| are monovision lenses easier to fit than bifocals | YES |
| are there more material choices for monovisions? | YES |
| can you get monovisions in sphere /torics or both? | BOTH |
| which has a wider field of view monovisions or bifocals? | monovisions |
| which is less expensive monovisions or bifocals? | monovisions |
| this type of lens is one single vision lens for dv or near | monovision |
| what are the two basic types of bifocal lens designs? | 1.alternating vision/translating bifocals 2.simultaneous vision |
| segmented lenses are more challenging because they need better ____ height measurements? | seg |
| 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 |
| the lower the evalue the ____ the fit | tighter |
| the higher the evalue the ___ the fit | looser |
| hyperflange is used on a _____ lens? | minus |
| hyperflange provides centration for __ riding lenses? | high |
| hypoxia means ? | lack of oxygen |
| diameter gauge, slot gauge, v-groove,shadowgraph, projection magnifier, hand held magnifier are instruments used to determine what? | diameter |
| measuring magnifier, loupe, and shadow graph is used to determine what? | OZ |
| thickness gauge and dial gauge are used to determine what? | center thickness |
| 5 groups water groups ? | 1.low water nonionic 2.high water nonionic 3.low water ionic 4.high water ionic 5.silicone hydrogel |
| does ionic or nonionic attract more deposites? | ionic |
| follow ups for a soft lens? | 1 week; 1 month; 3 months; 6 months; 12 months |
| aldox kills? | acanthomeba |
| polyquad is found in which manufactures products? | ALCON |
| silicone is added for ____ permeability? | oxygen |
| fluorine is used to increase ____ and deposit resistant. | wetablilty |
| start thinking about fitting a soft toric if the refracted cyl is _____? | -0.75 |
| if the refracted cyl is over -1.00 definityly fit a soft _____? | toric |
| lars stands for ? | left add ; right subract |
| dk value of 30 is ____ dk value of 151 is _____? | low/high |
| if a lens is high water it has more oxygen which means it has more _______? | deposits |
| acrylate is usually in context with what type of lens? | GP |
| if the refracted cyl is a -.25 or -.50 ______ is usually used | spherical equivalence |
| if refracted cyl is 0.75 or 1.00 fit ___ or toric | sphereical equivalence |
| compensate for VD if GREATER THAN _____(sphere only) | 4.00 |
Created by:
Britt7
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