CL Exam Quiz Questions
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- 1.Which of the following is NOT a physiological change associated with ACUTE lack of oxygen to the cornea?
- A.
Corneal neovascularization
- B.
Stromal edema
- C.
Epithelial microcysts
- D.
Endothelial folds
- 2.Choose the true statement (2)
- A.
The contact lens case should be replaced every 1-3 months
- B.
Before insertion or removal, it is best to use mild soaps that do not contain deodorants, creams, lanolin, or oils.
- C.
nasal scleral method, temporal scleral method, and inferior scleral method are the best methods of removal.
- D.
A bowl shaped contact lens during inspect test will lead to discomfort, blurred vision, and excessive movement in the eye.
- 3.Which of the following is a correct technique regarding hygiene and contact lenses?
- A.
Emptying the case, rinsing with disinfecting solution, and letting it air dry.
- B.
Replacing a contact lens case every 4-6 months.
- C.
Using hand sanitizer before insertion.
- D.
Digitally scrubbing the case with tap water.
- 4.Incomplete blinks in Hydrogen contact lens wear are linked to? (select 2)
- A.
Increased fluorescein staining
- B.
Decreased fluorescein staining
- C.
Increased lens deposition
- D.
Cell redistribution
- 5.Which of the following is FALSE regarding corneal curvature:
- A.
Corneal curvature is flattest at its apex
- B.
Corneal curvature flattens as it transitions into the sclera
- C.
Corneal curvature and scleral curvature are usually the same
- D.
The cornea does not have a perfect spherical curvature at any location
- 6.A patient comes in for a contact lens exam. The patient complains that her vision through the lens is not as good as it used to be. She is wearing the contact lenses to the exam so you examine them through the slit lamp. You see what looks like orange/red rust spots on the lens. What is the deposit on the lens and what is the most likely reason those spots are on her contacts? (Select 2)
- A.
Iron deposition
- B.
Using tap water on the contact lenses
- C.
Jelly Bumps
- D.
Leaving the cap open on solution bottles
- E.
Applying makeup before inserting contact lens
- F.
Applying makeup before inserting contact lens
- 7.Which of the following are NOT true regarding corneal topography?
- A.
A superior shift on the topographer is indicative of keratoconus.
- B.
The cornea does not have a perfectly spherical curvature at any point.
- C.
Irregular astigmatism is also known as nonorthogonal.
- D.
Typically, the right and left corneas are symmetrical mirror images of each other.
- 8.What are contraindications for soft contact lenses? (Select 3)
- A.
Autoimmune disease
- B.
Antihistamine use
- C.
Irregular astigmatism
- D.
Occasional wear
- 9.You would expect to see a large lateral lag in a lens with which of the following characteristics?
- A.
Loose fitting
- B.
Steep base curve
- C.
Good centration
- D.
Conjunctival drag
- 10.Which systemic condition is associated with dry eyes? (3)
- A.
Keratoconjunctivitis sicca
- B.
Rheumatoid arthritis
- C.
Thyroid conditions
- D.
High blood pressure
- 11.All of the following are characteristics of POOR contact lens candidates EXCEPT:
- A.
High refractive errors
- B.
Dry eyes
- C.
Tobacco smokers
- D.
Medications
- 12.Which of the following statements about soft toric CLs are TRUE (select 3):
- A.
Astigmats see WORSE in Soft toric lenses than GPs
- B.
Oblique axis degrades VA more than ATR or WTR
- C.
Soft toric CLs start at -0.75DC
- D.
Soft torics "mask" cyl
- 13.Which three components are evaluated when checking the physical fit of the lens?
- A.
Movement, Centration, Coverage
- B.
Base Curve, Diameter, and Rotation
- C.
Visual Acuity, Sagittal Depth, and Lens Dehydration
- D.
Lens position, Keratometry Mires, and Eyelid Interaction
- 14.A patient comes into your office and is complaining of stinging upon insertion of their contact lenses with noticeable injection. The patient is currently using Re-Nu Fresh contact lens solution. Which of the following is the best option of care for your patient?
- A.
Recommend using Opti-Free PureMoist by Alcon to replace current contact solution.
- B.
Recommend using Biotrue by Baush & Lomb to replace current contact solution.
- C.
Recommend Sensitive Eyes by Baush & Lomb to replace current contact solution.
- D.
Tell the patient to discontinue use of contact lenses.
- 15.Regarding magnification effects, myopes (select 2)
- A.
Often report things look larger with CLs
- B.
Will have less minification with CLs
- C.
Often report things look smaller with CLs
- D.
Will have less magnification with CLs
- 16.All of the following are true EXCEPT:
- A.
The stimulus to accommodate in hyperopes increases as a lens is moved toward the eye
- B.
With specs, myopes have BI induced at near
- C.
With specs, hyperopes have BO induced at near
- D.
Myopes will have less minification with CLs
- 17.Which of the following are true? (Select 2)
- A.
A myope will need more power with spec than contact lens
- B.
A plus lens is more effective when you move it closer to the eye
- C.
The "edge lift" with rigid lenses allows for tear exchange and better capillary attration
- D.
A hyperope with convergence insufficiency will prefer specs over cl
- 18.Which of the following are true regarding binocular and accommodative status? (select 2)
- A.
Myopes must accommodate and converge more with CLs than specs
- B.
Hyperopes must accommodate and converge less with CLs than specs
- C.
Myopes must accommodate and converge less with CLs than specs
- D.
Hyperopes must accommodate and converge more with Cls than specs
- 19.What are possible contraindication for contact lens wear? (select 2)
- A.
Corneal infiltrates
- B.
Fuchs endothelial dystrophy
- C.
Corneal scarring
- D.
- 20.What is the number one reason for a pt to discontinue cl wear?
- A.
Poor tear film
- B.
High re
- C.
Keratoconus
- D.
Peripheral corneal scar
- 21.A pt comes to your office for a cl exam. during the sle you see 0.5 mm of lumbal neovascularization. what should you do?
- A.
Monitor to prevent further neovascularization
- B.
Cl refit, discontinuation of cl or update material
- C.
Stop cl wear
- D.
Do nothing
- 22.Pachymetry is a measurement of ______ and is used to assess _____.
- A.
Corneal thickness; corneal edema
- B.
Corneal thickness; astigmatism
- C.
Corneal curvature; RGP fit
- D.
Corneal curvature; corneal edema
- 23.What is true about curvature map
- A.
All of the above are true
- B.
Sagittal map assumes the center of the radius of that curvature is always on a central axis
- C.
Tangential curvature does not assume where the center of the radius is
- D.
Mean curvature eliminates corneal astigmatism in order to highlight underlying features
- 24.Which of the following is NOT a tear film surface abnormality?
- A.
Acne rosacea
- B.
Lid retraction
- C.
Scar tissue formation
- D.
Ptosis
- 25.Which of the following statements about mucin is correct?
- A.
A mucin deficiency can result in dry spots in the tear film
- B.
A mucin deficiency can result in insufficient tear meniscus
- C.
The inner mucin layer is produced by the goblet cells, glands of Manz, and crypts of henle
- D.
The outer mucin layer is produced by the tarsal gland, gland of zeis, and gland of moll
- 26.Which of the following management techniques can cure dry eye?
- A.
None of the above
- B.
Punctal plugs
- C.
Artificial tears
- D.
Warm compresses
- 27.Which of the following will be the best type of lens for a first time wearer pt -2.00OD -2.25 OS with year round allergies
- A.
Dailies total 1
- B.
Bioinfinity toric
- C.
Air optix aqua
- D.
Acuvue oasys
- 28.A patient comes in complaining about their contact lenses. During the exam, you notice protein build up on their lenses. What possible FDA grouping could these contact lenses be? (select 2)
- A.
Group 1
- B.
Group 2
- C.
Group 3
- D.
Group 4
- 29.Select the following true statements about protein deposits. (select 2)
- A.
Seen as white dots across the surface of the lens
- B.
Seen as a whitish haze across the surface of the lens
- C.
Most common deposit type
- D.
Most common inorganic deposit type
- E.
Not readily seen in hydrogels
- 30.Which of the following is true of soft contact lenses?
- A.
HEMA materials have a greater DK with a lower water content
- B.
Sihys have a greater Dk with low water content and low silicone content
- C.
Sihys have a greater Dk with high water content and low silicone content
- D.
Sihys have a greater dk with high silicone content and low water content
- 31.What is the major source of oxygen for the endothelium?
- A.
Aqueous
- B.
Tears
- C.
Limbal vessels
- D.
Palpebral conjunctiva
- 32.Which of the following symptoms would be seen in a patient whose cornea has less oxygen consumption (due to CL abuse) (select 2)
- A.
Microcysts present
- B.
Shield ulcers
- C.
Endothelial folding
- D.
Purulent discharge
- 33.Which of the following is incorrect?
- A.
During the inspection test saucer shape is inverted
- B.
When teaching a pt to insert cl , they should use their dominant hand for more control
- C.
When the practioner inserts the lens, they should have the pt slowly look around before having the pt blink gently
- D.
Each time the lenses are inserted, the case should be disinfected and air dried
- 34.Your pt asks for some tips regarding insertion and removal. You tell them all of the following except
- A.
You should use OptiFree solution if you are allergic to Polyquad.
- B.
If you experience discomfort after insertion, remove the lens, check for inversion, and re-rinse the lens before reinsertion.
- C.
You should remove the CL from the temporal or inferior part of the eye, not directly off the cornea.
- D.
You should inspect the CL before inserting it in case it is dirty or inside out.
- 35.Which of the following statements are incorrect regarding soft contact lens care and solutions? (select 2)
- A.
Thermal disinfection is cheap but hard to find
- B.
Oxidative disinfection is very effective in disinfection and protein removal, but decreases lens life expectancy
- C.
Up to 99% of acanthamoeba and over 90% bacteria are removed by rubbing with the use of chemical disinfectant solution
- D.
Stinging upon contact lens insertion, itch and injection are common signs of solution sensitivity most often caused by preservatives in oxidative disinfectant solution
- 36.A contact lens wearer comes to your office complaining of red, painful eyes for past 2 days and is very worried about an Internet article saying it could be "an amoeba". Upon thorough case history, you find out the pair of contact lenses are 4 months old and patient sleeps in them 5 days out of the week. In addition, the patient uses a saline solution to clean the lenses, reports no tap water is ever used to clean, doesn't swim/shower in contacts. What should be thought of immediately BEFORE a SLE? (SELECT 2)
- A.
Assume acanthamoeba, treat accordingly.
- B.
Educate patient about saline solutions not having ability to disinfect, to switch to multipurpose solutions, and proper lens hygiene.
- C.
In the future, recommend Opti-free express for acanthamoeba disinfection since patient is worried about it.
- D.
Advise patient to discontinue using saline solution since it is more expensive.
- E.
Assume bacterial infection, treat accordingly.
- 37.Which of the following statement is true regarding oxidative disinfection in soft contact lens?
- A.
Requires neutralization by tablet or disc in 1-2 hrs
- B.
Not as effective in disinfection and protein removal
- C.
Contains preservatives that may irritate the eye
- D.
Disadvantages include cost and punctate keratitis
- 38.A patient is approved for a 1 year supply of Acuvue Oasys biweekly contact lenses. If each box contains 6 contact lenses, how many boxes need to be ordered to fulfill this request?
- A.
2 boxes total
- B.
4 boxes total
- C.
8 boxes total
- D.
12 boxes total
- 39.All of the following are true about soft contact lens material except:
- A.
Group 4 should avoid heat disinfection, sorbic acid and potassium sorbate, lens parameters may be sensitive to changes in pH
- B.
Group 3 includes many disposable or planned replacement lenses
- C.
Group 2 can be discolored by preservatives containing sorbic acid and potassium sorbate
- D.
Group 1 contain low water and nonionic polymers
- 40.A pt is asking about the advantages of soft cl, which of the following would you mention? (2)
- A.
Initial comfort
- B.
Durability
- C.
Less prone to deposits
- D.
Hard to dislodge
- 41.Which of the following are changes than occur in the corneal stroma due to contact lens wear? (pick 2)
- A.
Microcysts
- B.
Lactic acid accumulation
- C.
Polymegathism
- D.
Acidosis
- 42.Select the correct statements about soft cls
- A.
With steeper base curves, lens movement increases
- B.
Lens centration is assessed in primary gaze when blinking
- C.
Bubbles at limbus indicate flat fitting lens
- D.
Clear vision occurs as the eye remains open for a loose lens
- 43.Which of the following is not a characteristic of a tight lens?
- A.
Clear vision occurs immediately after a blink
- B.
Blur vision occurs after a full bliimk
- C.
Can buckle /wrinkle centrally
- D.
Little to no mvmnt or lag
- 44.What should you not do if you have a loose lens
- A.
Steepen the base curve
- B.
Change to a larger diameter
- C.
Change to a smaller diameter
- D.
Make sure the lens is not inside out
- 45.Which contact lens stabilization technique would you expect to have a thicker inferior portion of the lens with reduced O2 transmissibility in the thick zone and use gravity and lid force to put the lens in position?
- A.
Peribalast
- B.
Prism balast
- C.
Truncation
- D.
Dynamic stabilization
- 46.Considering the Correct RX is dispensed, All of the following are CAUSES of Foggy/Hazy Vision in “Contact Lens” EXCEPT:
- A.
Pt re
- B.
Deposited lens
- C.
Corneal edema
- D.
Desert climate
- 47.Longstanding contact lens wearers are most likely to notice all of the following tear film changes EXCEPT:
- A.
Decreased tear meniscus
- B.
Decreased TBUT
- C.
Decreased levels of phospholipids
- D.
Increased tear pH
- 48.What causes excessive movement when wearing soft contact lenses?
- A.
Deposited lenses
- B.
Corneal edema
- C.
Poor tear quality/quantity
- D.
Dryness
- 49.Which of the following tests are used to evaluate the quantity of the tear film? (2)
- A.
Slit lamp observation
- B.
Schirmer test
- C.
TBUT
- D.
Phenol red thread test
- 50.Which sources contribute the most oxygen to the cornea when the eye is CLOSED?
- A.
Limbal vessels
- B.
Palpebral conjunctiva
- C.
Aqueous
- D.
Two of the above
- E.
All of the above supply equal amounts of oxygen
- 51.The pts manifest refraction is -3.50-1.25x180. You correctly provide an initial diagnostic toric lens (based on a 12 mm vertex distance) that rotates 10 degrees CCW on the pts eye. what is the final CL rx?
- A.
-3.50-0.75x170
- B.
-3.50-1.00x170
- C.
-3.50-1.25x170
- D.
-3.50-0.75x010
- 52.Which of these presbyopic pts will most likely be able to see better at near without an add power?
- A.
Hyperopic pt wearing CLs
- B.
Myopic pt wearing glasses
- C.
Hyperopic pt wearing glasses
- D.
Myopic pt wearing Cls
- 53.A common complication of wearing hydrogel lenses, not sihys, overnight is
- A.
Myopic shift
- B.
Mucin balls
- C.
Microbial keratitis
- D.
Corneal erosions
- 54.Which are true concerning symmetry of the cornea? (select 2)
- A.
The nasal cornea flattens at a faster rate than the temporal conrea
- B.
The right and left corneas are symmetric direct images of each other
- C.
The temporal cornea flattens at a faster rate than the nasal cornea
- D.
The right and left corneas are symmetric mirror images of each other
- 55.Which is not an advantage of soft contact lenses?
- A.
Quality of vision
- B.
Little movement
- C.
Wettability
- D.
Simple to fit
- 56.
- A.
Quickly washing your hands before insertion and removal of contact lenses
- B.
Replacing cosmetics after 5 months
- C.
Putting contact lenses in new solution after every lens removal
- D.
Cleaning your contact lens case every other day with soap and water
- 57.Select the incorrect statement:
- A.
The 3 sources of O2 to the cornea are lipis, iris, vasculature and eyelid vasculature
- B.
The lower the H20 content in a SiHy contact lens the higher the Dk value
- C.
In Benjamins classification of oxygen permeability/ transmission a high Dk is 31-60
- D.
The tear pump supplies oxygen better when the eyes are open then while asleep
- 58.All of the choices are possible tx of dryness that can be experienced with soft lenses except which one?
- A.
Vitamin D supplements
- B.
Hydrogen peroxide care system
- C.
Punctal plug
- D.
Lens material that exhibit increased surface wettability
- 59.Which of the following is an incorrect statement regardiing oxidative disinfectants?
- A.
Someone sensitive to the preservatives in chemical disinfectants should be cautious of the preservatives in oxidative disinfectants
- B.
Like chemical disinfectants, oxidative disinfectants do not change the length of the lens life
- C.
Water and oxygen are the byproducts of hydrogen peroxide once it has been catalyzed
- D.
Contact lenses that have been cleaned and bleached for two hours in oxidative disinfectants should not be placed in the eye
- 60.A pt comes in for a contact lens fu. they are satisfied with the comfort and visual quality of the lenses and are compliant with their replacement and disinfection routine that you set up for them. However, you find out they have been swimming in freshwater with them during their underwater basket weaving lessons. you educate them on the risk of infection by a certain bacteria when using cl in freshwater, but they insist that they need them to clearly see. knowing all of this, you want to change their current chemical disinfection solution to one that will very likely be effective against bacteria you are concerned about. what solution do you tell them to use?
- A.
Revitalens
- B.
Aquify
- C.
Opti-free puremoist
- D.
Two of the above will work
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