Contact Lenses Questions & Answers: Quiz!
Have you ever had to wear a contact lens? A contact lens is a thin, soft lens placed directly on the surface of the eyes. They can be worn to rectify vision problems or even for cosmetic purposes. This quiz will have you seeing how much you know about contact lenses, how to maintain hygienic conditions for eye safety, what are the risk factors, and much more.
- 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?
- 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?
- 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
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