DSSSB Previous Year MCQs: Contact Lenses
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Q-1: A steep RGP contact lens fit will induce: (2024) (DSSSB Optometrist MCQs with year)
a. Negative tear lens power
b. Positive tear lens power
c. Zero net power
d. None of these
Answer: b. Positive tear lens power
When a rigid gas-permeable (RGP) contact lens is fitted steeper than the corneal curvature, it creates a vaulting effect that traps a thicker layer of tears centrally. This post-lens tear pool acts as a converging optical element, effectively inducing a positive (plus) tear lens power that must be compensated for in the final prescription.
When a rigid gas-permeable (RGP) contact lens is fitted steeper than the corneal curvature, it creates a vaulting effect that traps a thicker layer of tears centrally. This post-lens tear pool acts as a converging optical element, effectively inducing a positive (plus) tear lens power that must be compensated for in the final prescription.
Q-2: Which contact lenses are immediately comfortable after wearing and require a short adaptation time? (2024) (DSSSB Optometrist MCQs with year)
a. Rose-k Lenses
b. Soft lenses
c. Ortho-k lenses
d. RGP lenses
Answer: b. Soft lenses
Soft contact lenses are manufactured from highly flexible, hydrophilic polymer materials that instantly conform to the natural curvature of the cornea. This pliable nature minimizes mechanical friction against the eyelids, providing immediate comfort and requiring almost zero adaptation time compared to rigid lenses.
Soft contact lenses are manufactured from highly flexible, hydrophilic polymer materials that instantly conform to the natural curvature of the cornea. This pliable nature minimizes mechanical friction against the eyelids, providing immediate comfort and requiring almost zero adaptation time compared to rigid lenses.
Q-3: Contact lenses that are normally used on an extended wear basis to relieve pain and allow denuded epithelium to regain its normal structure are known as: (2024) (DSSSB Optometrist MCQs with year)
a. Rose K lens
b. X chrome lens
c. Bandage lens
d. RGP lens
Answer: c. Bandage lens
Bandage contact lenses act as a protective barrier over the cornea, shielding exposed nerve endings from the mechanical friction of blinking eyelids. This therapeutic application significantly relieves pain and creates a stable environment for the denuded corneal epithelium to migrate, multiply, and heal normally.
Bandage contact lenses act as a protective barrier over the cornea, shielding exposed nerve endings from the mechanical friction of blinking eyelids. This therapeutic application significantly relieves pain and creates a stable environment for the denuded corneal epithelium to migrate, multiply, and heal normally.
Q-4: Which of the following is NOT a characteristic of too tight a fit of soft contact lens? (2019) (DSSSB Optometrist MCQs with year)
a. No post – blink movement
b. 100% tight on push up test
c. Excessive movement of lens
d. Increasing oxygen permeability
Answer: c. Excessive movement of lens
A steep or tightly fitting soft contact lens will effectively vault the cornea and grip the limbus, resulting in a severely restricted or entirely absent lag during a blink. Excessive movement and decentration are the classic clinical hallmarks of a flat, loose-fitting lens rather than a tight one.
A steep or tightly fitting soft contact lens will effectively vault the cornea and grip the limbus, resulting in a severely restricted or entirely absent lag during a blink. Excessive movement and decentration are the classic clinical hallmarks of a flat, loose-fitting lens rather than a tight one.
Q-5: Which of the following is NOT a complication associated with the wearing of contact lens? (2019) (DSSSB Optometrist MCQs with year)
a. Giant papillary conjunctivitis
b. Corneal abrasion
c. Dry eye syndrome
d. ARMD
Answer: d. ARMD
Age-Related Macular Degeneration (ARMD) is a degenerative disease affecting the photoreceptors and retinal pigment epithelium deep within the posterior segment of the eye. Its complex pathogenesis is linked to age, genetics, and oxidative stress, making it entirely unrelated to the anterior surface wear of contact lenses.
Age-Related Macular Degeneration (ARMD) is a degenerative disease affecting the photoreceptors and retinal pigment epithelium deep within the posterior segment of the eye. Its complex pathogenesis is linked to age, genetics, and oxidative stress, making it entirely unrelated to the anterior surface wear of contact lenses.
Want to test your knowledge further?
Our complete course features hundreds of in-depth MCQs covering critical optometry topics such as:
- Ocular drug delivery systems via bandage contact lenses
- Single cut lens designs and front/back surface geometry
- Contact lens wettability and tear film adherence
- Oxygen permeability and transmissibility (Dk/L) calculations
- Causes of denatured protein deposits on lens matrices
- Infection risks associated with extended wear hydrogels
- Practice management and patient compliance strategies
- Incorporating PVP into silicone hydrogel matrices
- Vertex distance power conversion for high prescriptions
- Contraindications including corneal hypoesthesia
- Multi-curve Rose K designs for keratoconus management
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