#1
Which of the following is a common method used in assessing the fit of contact lenses?
Slit-lamp examination
ExplanationUsed to assess the fit of contact lenses by visualizing them on the eye.
#2
Which of the following is a complication associated with contact lens wear that can lead to vision loss if not properly managed?
Corneal neovascularization
ExplanationCan lead to vision loss if not properly managed, characterized by blood vessels growing into the cornea.
#3
Which of the following is NOT a type of soft contact lens material?
PMMA
ExplanationPMMA is not a soft contact lens material.
#4
Which of the following is a potential complication of contact lens wear related to corneal hypoxia?
Corneal neovascularization
ExplanationCorneal neovascularization can occur due to insufficient oxygen to the cornea.
#5
Which of the following is a common symptom of contact lens-induced dry eye?
Blurred vision
ExplanationBlurred vision can result from contact lens-induced dry eye.
#6
What does the term 'base curve' refer to in contact lens fitting?
The curvature of the lens surface
ExplanationRefers to the curvature of the lens surface, crucial for proper fit.
#7
Which of the following parameters is NOT typically assessed during a contact lens fitting?
Intraocular pressure
ExplanationIntraocular pressure is not typically assessed during contact lens fitting.
#8
What is the primary function of a toric contact lens?
To correct astigmatism
ExplanationDesigned to correct astigmatism by different curvatures in different meridians.
#9
What is the purpose of using fluorescein dye during a contact lens fitting?
To evaluate corneal surface integrity
ExplanationUsed to assess corneal surface integrity and to detect any irregularities.
#10
What type of contact lens is most commonly prescribed for patients with irregular corneas, such as those with keratoconus?
Scleral
ExplanationCommonly prescribed for patients with irregular corneas, providing better comfort and vision.
#11
Which type of contact lens is designed to be worn continuously for an extended period, typically up to 30 days?
Extended wear
ExplanationDesigned for continuous wear, typically up to 30 days.
#12
What is the purpose of using a slit-lamp microscope in contact lens assessment?
To visualize the fit of the lens on the eye
ExplanationUtilized to visualize the fit of the lens on the eye during assessment.
#13
Which of the following conditions is a contraindication for contact lens wear?
Keratoconjunctivitis sicca
ExplanationKeratoconjunctivitis sicca is a contraindication for contact lens wear.
#14
Which type of contact lens is most suitable for patients with dry eye syndrome?
Scleral lenses
ExplanationScleral lenses are often prescribed for patients with dry eye syndrome.
#15
Which of the following conditions may require a specialized contact lens design, such as a piggyback system?
Keratoconus
ExplanationKeratoconus may require specialized contact lens designs to improve vision and comfort.