Contact Lenses MCQ Quiz With Answers Latest

Contact Lenses MCQ Quiz With Answers Latest Update - 50 Questions with 100% Verified Correct Answers with Rationale Guaranteed A+ Verified by Professor

Questions and Answers

• 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 Correct Answer

• Corneal neovascularization

Explanation Corneal neovascularization is the growth of new blood vessels in the cornea, which is a response to chronic lack of oxygen. In acute lack of oxygen, the cornea does not have enough time to develop new blood vessels, so corneal neovascularization is not a physiological change associated with it. The other options, stromal edema, epithelial microcysts, and endothelial folds, are all physiological changes that can occur in response to acute lack of oxygen to the cornea.

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• 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.Correct Answer(s)

• The contact lens case should be replaced every 1-3 months
• Before insertion or removal, it is best to use mild soaps that do not contain

deodorants, creams, lanolin, or oils.Explanation The given answer is correct because it includes two true statements. The first statement states that the contact lens case should be replaced every 1-3 months, which is important for maintaining good hygiene and preventing the buildup of bacteria. The second statement advises using mild soaps without certain ingredients for insertion or removal of contact lenses, which helps to avoid irritation or damage to the eyes.

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• 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. 2 / 4

• B.

Replacing a contact lens case every 4-6 months.

• C.

Using hand sanitizer before insertion.

• D.

Digitally scrubbing the case with tap water.Correct Answer

• Emptying the case, rinsing with disinfecting solution, and letting it air dry.

Explanation Emptying the case, rinsing with disinfecting solution, and letting it air dry is a correct technique regarding hygiene and contact lenses. This process helps to remove any debris or bacteria from the case, ensuring that the lenses are stored in a clean and safe environment. Replacing a contact lens case every 4-6 months is also a good practice to prevent the buildup of bacteria. Using hand sanitizer before insertion can help to minimize the risk of introducing bacteria to the eyes. However, digitally scrubbing the case with tap water is not recommended as it may introduce contaminants and potentially damage the case.

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• 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 3 / 4

Correct Answer(s)

• Increased fluorescein staining
• Increased lens deposition

Explanation Incomplete blinks in Hydrogen contact lens wear can lead to increased fluorescein staining and increased lens deposition. When a person does not fully close their eyelids during a blink, the tears that normally spread across the surface of the eye and contact lens are not distributed evenly. This can result in areas of the eye and lens being exposed to less tears, leading to increased fluorescein staining. Additionally, incomplete blinks can also cause a buildup of debris and proteins on the lens, increasing lens deposition.

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• 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 Correct Answer

• Corneal curvature is flattest at its apex

Explanation The corneal curvature is not flattest at its apex. The cornea is actually steepest at its apex, which is the center of the cornea. As the cornea transitions into the sclera, it gradually flattens. The corneal curvature and scleral curvature are usually not the same, as the sclera has a different shape and curvature compared to the cornea. Additionally,

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